Hydrogen purification system and method

Abstract

The invention relates to a hydrogen purification control system and method, and the system comprises a drying tower group which is provided with at least three drying towers, each drying tower is arranged according to a preset interval, and the drying towers are used for adsorbing impurities in hydrogen and receiving hydrogen meeting the preset purity so as to restore the adsorption function of the drying towers; the hydrogen storage assembly is arranged in the hydrogen output direction of the drying tower and used for detecting the purity of the hydrogen and storing the hydrogen meeting the preset purity; the valve group is arranged at an inlet and an outlet of the drying tower group and is used for realizing a first flow channel, a second flow channel and a third flow channel, and in the first flow channel, any drying tower is communicated with the hydrogen storage assembly and is used for transmitting hydrogen to the hydrogen storage assembly; in the second flow channel, any number of drying towers are communicated with one another and are used for enabling hydrogen to reach preset purity; and in the third flow channel, in any number of drying towers, any drying tower receives hydrogen meeting the preset purity and communicates with any other drying tower, so that any drying tower without the adsorption function recovers the adsorption function. According to the invention, the hydrogen purification efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of hydrogen purification, and in particular to a hydrogen purification system and method. Background Art

[0002] Hydrogen fuel vehicles, hydrogen internal combustion engines and other application scenarios have extremely high requirements for hydrogen purity. Therefore, water electrolysis hydrogen production equipment will be equipped with a hydrogen purification device to obtain higher purity hydrogen. Temperature swing adsorption is often used in industrial hydrogen purification. Temperature swing adsorption does not require frequent replacement of adsorbents, so the stability and reliability of the equipment are good, which can better control the purity and output of hydrogen.

[0003] At present, the common hydrogen purification method in industry is the three-tower temperature swing adsorption method. Hydrogen passes through three drying towers in sequence, and the operation mode of one tower adsorption, one tower regeneration, and one tower re-adsorption is used to complete the purification of hydrogen. In this method, the dryer is used entirely for adsorption regeneration, and the water content of the dry gas after regeneration increases. After the second adsorption, the purity of the hydrogen will not meet the standard. At the same time, since the adsorption time and regeneration time are fixed, there may be a situation where the regenerated gas is insufficient, which affects the adsorption of the next stage, or the regeneration begins before sufficient adsorption, so the purity of the hydrogen is low, and therefore, there is a problem of low purification efficiency. Summary of the invention

[0004] The embodiments of the present application provide a hydrogen purification system and method to at least solve the problem of low hydrogen purification efficiency in the related art.

[0005] In a first aspect, an embodiment of the present application provides a hydrogen purification control system, comprising:

[0006] A drying tower group, with at least three drying towers, each of which is arranged at a preset interval, for adsorbing impurities in hydrogen and receiving hydrogen meeting a preset purity to restore the adsorption function of the drying tower;

[0007] A hydrogen storage assembly is arranged along the direction in which the drying tower outputs hydrogen, and is used to detect the purity of the hydrogen and store hydrogen that meets a preset purity;

[0008] The valve group is arranged at the inlet and outlet of the drying tower group, and is used to realize the first flow channel, the second flow channel and the third flow channel, wherein, in the first flow channel, any drying tower is connected with the hydrogen storage assembly to transmit hydrogen to the hydrogen storage assembly; in the second flow channel, any number of drying towers are connected with each other to make the hydrogen reach a preset purity; in the third flow channel, among any number of drying towers, any drying tower receives hydrogen meeting the preset purity and is connected with any other drying tower to restore the adsorption function of any drying tower that does not have the adsorption function.

[0009] In one embodiment, the valve assembly comprises:

[0010] The pneumatic ball valve group is installed at the inlet and outlet of the drying tower group to control the input and output of hydrogen into and out of the drying tower group;

[0011] The pneumatic three-way valve group is arranged between the pneumatic ball valve group and the hydrogen storage assembly along the transmission direction of hydrogen in the first flow channel, and is used to connect the first flow channel and the third flow channel, transmit hydrogen to the hydrogen storage assembly through the first flow channel, and transmit hydrogen that meets the preset purity to the drying tower group through the second flow channel.

[0012] In one embodiment, the pneumatic ball valve assembly comprises:

[0013] A first valve group is arranged at the inlet and outlet of the drying tower group, and is used to control the flow of hydrogen in the first flow channel into and out of the drying tower group, so as to realize the transmission of hydrogen to the hydrogen storage component;

[0014] The second valve group is arranged at the inlet and outlet of the drying tower group, and is used to control the inlet and outlet of the hydrogen in the second flow channel to the drying tower group, so as to realize the transmission of hydrogen between any number of drying towers;

[0015] The third valve group is arranged at the inlet and outlet of each drying tower in the drying tower group, and is used to control the hydrogen in the third flow channel to enter and exit the drying tower group, so as to realize the recovery adsorption function of the drying tower.

[0016] In one embodiment, the hydrogen purification control system further comprises:

[0017] A flow monitoring component is arranged at the inlet and outlet of the drying tower group along the transmission direction of hydrogen in the first flow channel and the third flow channel, and is used to detect the flow data of hydrogen flowing into the drying tower group from the first flow channel and the flow data of hydrogen flowing into the drying tower group from the third flow channel;

[0018] A temperature monitoring component is arranged at the inlet and outlet of the drying tower group along the transmission direction of the hydrogen in the first flow channel and the third flow channel, and is used to detect the temperature of the hydrogen flowing out of the drying tower group in the first flow channel and the temperature of the hydrogen flowing into the drying tower group in the third flow channel;

[0019] A temperature regulating component is arranged between the hydrogen storage component and the valve group along the direction of hydrogen transmission in the second flow channel, and is used to regulate the hydrogen meeting the preset purity to a preset temperature;

[0020] In one embodiment, the temperature regulating assembly comprises:

[0021] A heating component is disposed between the hydrogen storage component and the flow monitoring component located in the third flow channel along the transmission direction of the hydrogen in the third flow channel, and is used to heat the hydrogen meeting the preset purity to a first preset temperature;

[0022] The cooling component is arranged between the valve group and the flow monitoring component located in the first flow channel along the transmission direction of the hydrogen in the third flow channel, and is used for cooling the heated hydrogen to a second preset temperature.

[0023] In one embodiment, the temperature adjustment component further comprises:

[0024] The gas-liquid separator is arranged between the cooling component and the valve group along the transmission direction of the hydrogen in the third flow channel, and is used for separating water from the hydrogen that reaches the second preset temperature.

[0025] In one embodiment, the hydrogen storage assembly comprises:

[0026] A hydrogen storage component is arranged at the end of the first flow channel and is used to store hydrogen;

[0027] The hydrogen purity analysis component is arranged between the hydrogen storage component and the valve group along the transmission direction of the hydrogen in the first flow channel, and is used to detect the purity of the hydrogen.

[0028] In a second aspect, an embodiment of the present application provides a hydrogen purification method, which is applied to a hydrogen purification control system, including:

[0029] Obtain historical operation data of the drying tower group, and determine the drying tower to be adsorbed and the drying tower to be regenerated in the drying tower group;

[0030] Opening the first flow channel corresponding to the drying tower to be adsorbed, so that the hydrogen is transmitted to the hydrogen storage component for testing to obtain the purity of the hydrogen;

[0031] If the purity is greater than or equal to the preset purity, the hydrogen is stored, and the third flow channel corresponding to the drying tower to be regenerated is opened to transmit the hydrogen meeting the preset purity to the drying tower to be regenerated, so that the drying tower to be regenerated has the adsorption function again;

[0032] If the purity is less than the preset purity, the hydrogen that does not meet the preset purity is emptied, the number of drying towers to be adsorbed is adjusted, and the second flow channel corresponding to each drying tower to be adsorbed is opened to allow the hydrogen to pass through a certain number of adsorption towers to obtain hydrogen that meets the preset purity.

[0033] In one embodiment, the third flow channel corresponding to the drying tower to be regenerated is opened to transmit hydrogen meeting a preset purity to the drying tower to be regenerated, so that the drying tower to be regenerated has an adsorption function again, including:

[0034] The heating component is turned on to heat the hydrogen meeting the preset purity to a first preset temperature. When the temperature monitoring component detects that the temperature of the hydrogen reaches the first preset temperature and the flow component detects that the flow of the hydrogen at the first preset temperature accumulates to the first preset flow, the heating component is turned off and the hydrogen is transmitted to the drying tower to be regenerated;

[0035] Turning on the cooling component to cool the hydrogen at the first preset temperature that has passed through the drying tower to be regenerated to a second preset temperature, and performing gas-liquid separation on the hydrogen at the second preset temperature in the gas-liquid separation component to precipitate water in the hydrogen at the second preset temperature to obtain regenerated hydrogen;

[0036] The regenerated hydrogen is transmitted along the third flow channel to the drying tower to be regenerated. When the temperature monitoring component on the first flow channel monitors that the temperature of the regenerated hydrogen reaches the third preset temperature, the drying tower to be regenerated has the adsorption function again.

[0037] In one embodiment, after storing the hydrogen if the purity is greater than or equal to the preset purity, the method further comprises:

[0038] Based on the flow monitoring component, the cumulative adsorption flow and adsorption time of the drying tower to be adsorbed are obtained;

[0039] When the adsorption flow rate is greater than or equal to the second preset flow rate and the adsorption time is greater than or equal to the preset adsorption time, the current drying tower is closed, and based on the valve group, the first flow channel of any drying tower with adsorption capacity is opened to continuously purify the hydrogen.

[0040] In one embodiment, after closing the current drying tower and opening the first flow channel of any drying tower with adsorption capacity based on the valve group, the method further includes:

[0041] If the second flow channel of the closed drying tower is in an open state, the second flow channel corresponding to any drying tower with adsorption capacity is opened, so that the drying tower with the second flow channel opened maintains hydrogen purification.

[0042] A hydrogen purification system and method provided in the embodiments of the present application have at least the following technical effects.

[0043] In the hydrogen purification control system, the first flow channel is controlled by the valve group to transmit hydrogen to the hydrogen storage component. After detection by the hydrogen storage component, hydrogen that meets the preset purity is stored, and hydrogen that meets the preset purity is passed through the third flow channel, so that any drying tower receives hydrogen of the preset purity, so that the drying tower restores the adsorption function. The hydrogen storage component detects that the hydrogen purity does not meet the preset purity, controls the second flow channel through the valve group, and passes the hydrogen through the second flow channel and through multiple drying towers, so that the drying tower adsorbs impurities in the hydrogen, so that the hydrogen reaches the preset purity. According to the switching of the first flow channel, the second flow channel and the third flow channel, the first flow channel transmits hydrogen. If the hydrogen purity does not meet the preset purity, it switches to the second flow channel to meet the hydrogen purity requirements; hydrogen that meets the preset purity is partially stored and partially used to restore the adsorption function of the drying tower, thereby simplifying the hydrogen purification process and improving the hydrogen purification efficiency.

[0044] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0046] Figure 1 is a schematic diagram of a hydrogen purification system according to an exemplary embodiment;

[0047] Figure 2 is a flow chart of a hydrogen purification method according to an exemplary embodiment.

[0048] In the above drawings, the meanings of the reference numerals are as follows:

[0049] 100, a drying tower group, 101, a first drying tower, 102, a second drying tower, 103, a third drying tower;

[0050] 200, hydrogen storage component, 201, hydrogen preservation component, 202, hydrogen purity detection component;

[0051] 300, valve group, 301, pneumatic three-way valve group, 3011, first valve group, 3012, second valve group, 3013 third valve group, 302 pneumatic ball valve group;

[0052] 400, flow monitoring component; 500, temperature monitoring component, 501, first temperature monitoring component, 502, second temperature monitoring component;

[0053] 600, temperature adjustment component, 601, heating component, 602, cooling component. 603, gas-liquid separation component;

[0054] 700, first flow channel; 800, second flow channel; 900, third flow channel;

[0055] 9. The inlet valve of the second flow channel corresponding to the third drying tower; 11. The outlet valve of the second flow channel corresponding to the second drying tower; 12. The outlet valve of the first flow channel corresponding to the third drying tower, 16. The outlet valve of the third flow channel corresponding to the first drying tower, 21. The second inlet valve of the third flow channel of the first drying tower. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0057] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0058] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0059] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0060] In a first aspect, an embodiment of the present application provides a hydrogen purification system. Figure 1 is a schematic diagram of a hydrogen purification system according to an exemplary embodiment. Figure 1 As shown, the hydrogen purification system includes:

[0061] The drying tower group 100 is provided with at least three drying towers, each of which is arranged at a preset interval and is used to adsorb impurities in hydrogen and receive hydrogen meeting a preset purity to restore the adsorption function of the drying tower.

[0062] The hydrogen storage assembly 200 is arranged along the direction in which the drying tower outputs hydrogen, and is used to detect the purity of the hydrogen and store hydrogen that meets a preset purity.

[0063] The valve group 300 is arranged at the inlet and outlet of the drying tower group 100, and is used to realize the first flow channel 700, the second flow channel 800 and the third flow channel 900, wherein in the first flow channel 700, any drying tower is connected to the hydrogen storage assembly 200, and is used to transmit hydrogen to the hydrogen storage assembly 200; in the second flow channel 800, any number of drying towers are connected to each other, and are used to make the hydrogen reach a preset purity; in the third flow channel 900, among any number of drying towers, any drying tower receives hydrogen that meets the preset purity and is connected to any other drying tower, and is used to restore the adsorption function of any drying tower that does not have the adsorption function.

[0064] The drying towers in the drying tower group 100 have the function of absorbing impurities in hydrogen. Since the adsorption capacity of the drying tower is limited, when the drying tower adsorbs enough impurities, it loses the adsorption function, but after treatment, the drying tower can have the adsorption function again and absorb the impurities in hydrogen again.

[0065] In the drying tower group 100, at least three drying towers are provided, wherein the number of drying towers is not specifically limited. Hydrogen is transmitted to the drying tower group 100, and the drying tower group 100 adsorbs impurities in the hydrogen to complete the purification of the hydrogen. During the process of the drying tower group 100 purifying the hydrogen, at least one drying tower does not participate in the adsorption of hydrogen, providing a basis for the subsequent drying tower cycle work to be replaced.

[0066] The valve group 300 includes a pneumatic ball valve group 301 and a pneumatic three-way valve group 302, which are specifically configured as follows:

[0067] The pneumatic ball valve group 301 is arranged at the inlet and outlet of the drying tower group 100 and is used to control the input and output of hydrogen into and out of the drying tower group 100 .

[0068] The pneumatic three-way valve group 302 is arranged between the pneumatic ball valve group 301 and the hydrogen storage assembly 200 along the transmission direction of hydrogen in the first flow channel, and is used to connect the first flow channel 700 and the third flow channel 900, transmit hydrogen to the hydrogen storage assembly 200 through the first flow channel 700, and transmit hydrogen meeting the preset purity to the drying tower group 100 through the second flow channel 800.

[0069] In the hydrogen purification control system, any drying tower in the drying tower group 100 relies on the valve group to realize the first flow channel 700, the second flow channel 800 and the third flow channel 900, wherein each flow channel is provided with a corresponding valve group, specifically including:

[0070] The first valve group 3011 is disposed at the inlet and outlet of each drying tower in the drying tower group 100, and is used to control the flow of hydrogen in the first flow channel 700 into and out of the drying tower group 100, so as to realize the transmission of hydrogen to the hydrogen storage component.

[0071] The second valve group 3012 is disposed at the inlet and outlet of each drying tower in the drying tower group 100, and is used to control the flow of hydrogen in the second flow channel 800 into and out of the drying tower group 100, so as to realize the transmission of hydrogen between any number of drying towers.

[0072] The third valve group 3013 is disposed at the inlet and outlet of each drying tower in the drying tower group 100, and is used to control the hydrogen in the third flow channel 900 to enter and exit the drying tower group 100, so as to realize the recovery adsorption function of the drying tower.

[0073] In addition, the detection and storage methods of the hydrogen storage assembly 200 specifically include:

[0074] The hydrogen storage component 201 is disposed at the end of the first flow channel 700 and is used to store hydrogen meeting a preset purity.

[0075] The hydrogen purity analysis component 202 is disposed between the hydrogen storage component 201 and the valve group 300 along the transmission direction of the hydrogen in the first flow channel 700, and is used to detect the purity of the hydrogen.

[0076] After the hydrogen is purified by the drying tower group 100, the outlet of the drying tower transmits the hydrogen to the hydrogen storage component 200. The hydrogen purity analysis component 202 receives the hydrogen and detects the purity of the hydrogen. If the hydrogen meets the preset purity, the hydrogen meeting the preset purity is transmitted to the hydrogen storage component 201, so that the hydrogen storage component 201 stores the hydrogen meeting the preset purity. If the hydrogen does not meet the preset purity, the hydrogen purity analysis component 202 evacuates the hydrogen that does not meet the preset purity to detect the hydrogen to be transmitted next time.

[0077] In the hydrogen purification control system, in order to obtain hydrogen of a preset purity, the inlet valve and the outlet valve in the first valve group 3011 are opened, so that the hydrogen flows into any drying tower through the first flow channel 700, so that the drying tower adsorbs impurities in the hydrogen, purifies the hydrogen, and transmits the purified hydrogen through the first flow channel to the hydrogen purity detection component. If the purity of the purified hydrogen does not meet the preset purity after being detected by the hydrogen purity detection component 202, the hydrogen that does not meet the preset purity will be discharged.

[0078] After the hydrogen that does not meet the preset purity is emptied, another drying tower for adsorption is added based on the original drying tower for adsorption. Based on the newly added drying tower, the second flow channel 800 between the drying towers for adsorption is opened, so that the hydrogen can be transmitted between the drying towers, so that the drying towers adsorb impurities in the hydrogen and the hydrogen can reach the preset purity.

[0079] By adding new drying towers and based on the second flow channel 800, the hydrogen passes through multiple drying towers, so that the drying towers can completely absorb impurities in the hydrogen, thereby ensuring the purity of the hydrogen and improving the efficiency of purifying the hydrogen.

[0080] If the hydrogen purity meets the preset purity, the pneumatic three-way valve group 301 is opened, and on the one hand, the hydrogen meeting the preset purity in the first flow channel 700 is transmitted to any drying tower in the drying tower group 100 in a non-adsorption state through the third flow channel 900 to restore its adsorption function. On the other hand, the hydrogen meeting the preset purity is transmitted to the hydrogen storage component 201 through the first flow channel 700 for storage.

[0081] By using the second flow channel 800 and hydrogen meeting the preset purity, the adsorption capacity of any drying tower in the drying tower group 100 that does not have the adsorption capacity is restored, and the hydrogen purification control system further includes:

[0082] The flow monitoring component 400 is arranged at the inlet and outlet of the drying tower group 100 along the transmission direction of hydrogen in the first flow channel 700 and the third flow channel, and is used to detect the hydrogen flow data flowing into the drying tower group 100 from the first flow channel 700 and the hydrogen flow data flowing into the drying tower group 100 from the third flow channel.

[0083] The temperature monitoring component 500 is arranged at the inlet and outlet of the drying tower group 100 along the transmission direction of the hydrogen in the first flow channel 700 and the third flow channel, and is used to detect the temperature of the hydrogen flowing out of the drying tower group 100 in the first flow channel 700 and the temperature of the hydrogen flowing into the drying tower group 100 in the third flow channel.

[0084] The temperature adjustment component 600 is disposed between the hydrogen storage component 200 and the valve group 300 along the direction of hydrogen transmission in the second flow channel 800, and is used to adjust the hydrogen meeting the preset purity to a preset temperature.

[0085] In addition, the temperature adjustment component 600 specifically includes: a heating component 601, a cooling component 602 and a gas-liquid separation component 603. The heating component 601 is arranged between the hydrogen storage component 200 and the flow monitoring component 400 located in the third flow channel 900 along the transmission direction of the hydrogen in the third flow channel 900, and is used to heat the hydrogen meeting the preset purity to the first preset temperature;

[0086] The cooling component 602 is disposed between the valve group 300300 and the flow monitoring component 400 located in the first flow channel 700 along the transmission direction of the hydrogen in the third flow channel, and is used to cool the heated hydrogen to a second preset temperature.

[0087] The gas-liquid separator 603 is arranged between the cooling component 602 and the valve group 300300 along the transmission direction of the hydrogen in the third flow channel, and is used to separate the water gas from the hydrogen that reaches the second preset temperature.

[0088] When the hydrogen meeting the preset purity passes through the heating component 601, the hydrogen meeting the preset purity is heated to the first preset temperature. The heated hydrogen is monitored by the temperature monitoring component 500 and the flow monitoring component 400. When the temperature monitoring component 500 monitors that the hydrogen temperature in the third flow channel is greater than or equal to the first preset temperature, and the flow monitoring component 400 monitors that the accumulated hydrogen flow in the third flow channel is greater than or equal to the first preset flow, the heating component 601 is closed, the first inlet valve in the third valve group 300 is opened, and the hydrogen at the first preset temperature is transmitted to any drying tower without adsorption function in the drying tower group 100, so that any drying tower with adsorption function is heated and regenerated, so that the drying tower without adsorption function restores the adsorption function. The outlet valve, the second inlet valve and the cooling component 602 in the third valve group 300 are opened, so that the heated hydrogen passes through the cooling component 602, the temperature of the hydrogen is reduced to the second preset temperature, and the cooled hydrogen is separated from the water by the gas-liquid separation component 603. The separated hydrogen enters the drying tower for restoring the adsorption function through the second inlet valve, and the hydrogen in the drying tower passes through the temperature monitoring component 500 of the first flow channel 700. When the temperature monitoring component 500 detects that the temperature of the hydrogen is at the third preset temperature, the drying tower can be used again for hydrogen purification.

[0089] When there is no drying tower in the drying tower group 100 that needs to restore the adsorption function, the valve group 300 corresponding to the third flow channel is closed to allow hydrogen meeting the preset purity to be transmitted from the first flow channel 700 to the hydrogen storage component 201 for storage of hydrogen.

[0090] In one embodiment, in any drying tower used for adsorption, if the accumulated adsorption flow in the flow monitoring component 400 in the first flow channel 700 reaches a preset flow, it means that the drying tower no longer has the adsorption capacity, and the first valve group 300 of the first flow channel 700 of the drying tower is closed, and any drying tower with adsorption capacity in the drying tower group 100 is opened to continue hydrogen purification.

[0091] In the process of restoring the adsorption capacity of a drying tower that has no adsorption capacity, hydrogen that meets the preset purity is used and heated and cooled, so that the drying tower that has no adsorption capacity can restore the adsorption capacity and purify the hydrogen, which simplifies the hydrogen purification process and reduces the complexity of the pipeline layout in the system.

[0092] In the hydrogen purification control system, based on the first flow channel 700, hydrogen can obtain hydrogen of a certain purity through the drying tower group 100. If the purity of the hydrogen meets the preset purity, it is stored and used in the second flow channel 800 to restore the drying tower. The third flow channel is connected to the first flow channel 700, and the heating component 601, the cooling component 602 and the gas-liquid separation component 603 are all on the second flow channel 800, thereby simplifying the process flow and reducing the difficulty of arranging the pipeline, so that the drying tower without adsorption capacity can be quickly restored. If the purity of the hydrogen is not satisfied, a drying tower with adsorption function is added, and the purity of the hydrogen reaches the preset purity through the second flow channel 800. The first flow channel 700, the second flow channel 800, and the third flow channel 900 cooperate with each other, thereby improving the efficiency of hydrogen purification.

[0093] In a second aspect, the present application provides a method for purifying hydrogen. Figure 2 is a flow chart of a hydrogen purification method according to an exemplary embodiment. Figure 2 As shown, the hydrogen purification method includes:

[0094] Step S101, obtaining historical operation data of a drying tower group, and determining a drying tower to be adsorbed and a drying tower to be regenerated in the drying tower group.

[0095] The hydrogen purification control system automatically obtains the historical operation data of each drying tower in the drying tower group 100, wherein the historical operation data includes the role played by each drying tower in the hydrogen purification process. Thus, the drying tower to be adsorbed and the drying tower to be regenerated in the drying tower group 100 are determined based on the historical operation data, wherein the drying tower to be adsorbed is a drying tower with an adsorption function, and the drying tower to be regenerated is a drying tower without an adsorption function. According to whether the drying tower has an adsorption function, it is determined that the drying tower to be adsorbed that the hydrogen to be purified enters.

[0096] Step S102, opening the first flow channel corresponding to the drying tower to be adsorbed, so that the hydrogen is transmitted to the hydrogen storage component for detection to obtain the purity of the hydrogen.

[0097] Open the inlet valve and the outlet valve of the first flow channel 700 corresponding to the drying tower to be adsorbed, so that the hydrogen is transmitted to the drying tower to be adsorbed through the first flow channel 700, so that the drying tower to be adsorbed adsorbs impurities in the hydrogen, and transmits the adsorbed hydrogen to the hydrogen purity detection component 202 in the hydrogen storage component 200 for purity detection to obtain the purity of the hydrogen.

[0098] It should be noted that after storing hydrogen, it also includes:

[0099] Based on the flow monitoring component 400, the cumulative adsorption flow and adsorption time of the drying tower to be adsorbed are obtained.

[0100] When the accumulated adsorption flow is greater than or equal to the second preset flow and the adsorption time is greater than or equal to the preset adsorption time, the valve group 300 of the first flow channel 700 corresponding to the current drying tower is closed, and the first flow channel 700 of any drying tower with adsorption capacity is opened to continuously purify the hydrogen.

[0101] If the second flow channel 800 of the closed drying tower is in an open state, the other opened drying tower with adsorption function also needs to open the corresponding second flow channel 800, so that the drying tower connected by the second flow channel 800 can continue to purify hydrogen.

[0102] It should be noted that the closed drying tower will serve as the drying tower to be regenerated in the next hydrogen purification process.

[0103] When the drying tower to be adsorbed no longer has the adsorption function, the drying tower is closed and another drying tower with adsorption function is opened to ensure that the hydrogen purification process will not stop suddenly, thereby improving the hydrogen purification efficiency.

[0104] Step S103: If the purity is greater than or equal to the preset purity, store the hydrogen, open the third flow channel corresponding to the drying tower to be regenerated, and transmit the hydrogen meeting the preset purity to the drying tower to be regenerated, so that the drying tower to be regenerated has the adsorption function again.

[0105] If the purity of hydrogen is greater than or equal to the preset purity, the heating component 601 is turned on to heat the hydrogen that meets the preset purity to the first preset temperature. When the first temperature monitoring component 501 detects that the temperature of the hydrogen has reached the first preset temperature, and the flow monitoring component 400 detects that the hydrogen flow at the first preset temperature has accumulated to the first preset flow, the heating component 601 is turned off, and the hydrogen is transmitted to the drying tower to be regenerated, so that the drying tower to be regenerated has an adsorption function. However, the temperature of the drying tower to be regenerated at this time is too high and is not suitable for the hydrogen purification process. Therefore, the drying tower to be regenerated has not yet been regenerated, and it needs to be cooled so that it can purify the hydrogen. Among them, the cumulative hydrogen flow includes the product of the hydrogen flow and the time over which its flow passes. For example, the hydrogen flow is V0 m 3 / h, the heating regeneration time is t0, the unit is h, then the accumulated flow rate is V, then V=V0×t0.

[0106] The cooling component 602 is turned on to cool the hydrogen at the first preset temperature passing through the drying tower to be regenerated to a second preset temperature, and the hydrogen at the second preset temperature is subjected to gas-liquid separation in the gas-liquid separation component 603 to precipitate water in the hydrogen at the second preset temperature to obtain regenerated hydrogen.

[0107] The regenerated hydrogen is transmitted along the third flow channel to the drying tower to be regenerated, and the regenerated hydrogen can cool the temperature machine to be regenerated through the drying tower to be regenerated. When the second temperature monitoring component 502 on the first flow channel 700 monitors that the temperature of the regenerated hydrogen coming out of the drying tower to be regenerated reaches the third preset temperature, the drying tower to be regenerated can purify the hydrogen again, that is, the regeneration of the drying tower to be regenerated is completed.

[0108] The drying tower to be regenerated is regenerated by hydrogen meeting a preset purity and the third flow channel to restore its adsorption function, thereby simplifying the process flow of hydrogen purification and improving the efficiency of hydrogen purification.

[0109] Step S104: if the purity is less than the preset purity, the hydrogen that does not meet the preset purity is emptied, the number of drying towers to be adsorbed is adjusted, and the second flow channel corresponding to each drying tower to be adsorbed is opened to allow the hydrogen to pass through a number of adsorption towers to obtain hydrogen that meets the preset purity.

[0110] If the purity of hydrogen is less than the preset purity, the hydrogen purity detection component 202 evacuates the hydrogen that does not meet the preset purity, and adds another drying tower for adsorption based on the original drying tower for adsorbing hydrogen impurities. For example, initially one drying tower to be adsorbed is used to adsorb hydrogen, and the hydrogen purity detection component 202 detects that the purity of hydrogen after adsorbing impurities does not meet the preset purity, then in the next cycle, an additional drying tower to be adsorbed is added, that is, two drying towers to be adsorbed are used to purify hydrogen.

[0111] Therefore, after the drying towers for adsorption are added, the second flow channels 800 of all the drying towers for adsorption are started, so that the hydrogen is purified in these drying towers for adsorption to obtain hydrogen meeting the preset purity.

[0112] According to the purity of hydrogen, the number of drying towers used for adsorption is adjusted to obtain hydrogen meeting the preset purity, which reduces the time waiting for the drying tower to regenerate, thereby improving the efficiency of hydrogen purification.

[0113] In one embodiment, continue to refer to Figure 1 According to the historical data of the drying tower group 100, the first drying tower 101 is determined to be the drying tower to be regenerated, and the second drying tower 102 is determined to be the drying tower to be adsorbed. The hydrogen enters the second drying tower through the first flow channel 700, and the impurities are adsorbed by the second drying tower to obtain hydrogen with a certain purity. The hydrogen is transmitted to the hydrogen purity detection component 202 through the first flow channel 700 to obtain the hydrogen purity.

[0114] When the hydrogen purity meets the preset purity, the second pneumatic three-way valve 23 in the pneumatic three-way valve group is opened, so that the hydrogen meeting the preset purity is transmitted to the heating component 601 through the third flow channel. The heating component 601 heats the hydrogen meeting the preset purity to the first preset temperature, and according to the first temperature monitoring component 501 and the flow monitoring component 400, the hydrogen reaching the first preset temperature and the first preset flow is transmitted to the first drying tower 101, so that the first drying tower 101 is heated and regenerated to restore the adsorption function.

[0115] Based on the outlet valve 16 of the third flow channel corresponding to the first drying tower 101, it is transmitted to the cooling component 602 and the gas-liquid separation component 603. The cooling component 602 cools it to the second preset temperature, and performs gas-liquid separation on the hydrogen at the second preset temperature to obtain regenerated hydrogen. The regenerated hydrogen passes through the second inlet valve 21 of the third flow channel of the first drying tower 101, enters the first drying tower, and is cooled. When the regenerated hydrogen comes out of the first flow channel 700 in the first drying tower, and the second temperature monitoring component 502 located on the first flow channel 700 monitors that the temperature of the gas is the third preset temperature, the regeneration of the first drying tower 101 is completed, and it has adsorption capacity again, and can purify hydrogen.

[0116] When the purity of hydrogen does not meet the preset purity, the hydrogen purity analysis component evacuates the hydrogen that does not meet the preset purity, and adds the third drying tower 103 during the hydrogen purification process. Close the outlet valve of the second drying tower 102 corresponding to the first flow channel 700, open the outlet valve 11 of the second flow channel 800 corresponding to the second drying tower 102 and the inlet valve 9 of the second flow channel 800 corresponding to the third drying tower 103 and the outlet valve 12 of the corresponding first flow channel 700. Thus, when hydrogen flows into the second drying tower 102 for purification, the hydrogen is purified by the second drying tower 102, and then transmitted to the third drying tower 103 through the second flow channel 800, and the hydrogen is purified again, and the purified hydrogen is transmitted to the hydrogen purity analysis component through the first flow channel 700 of the third drying tower 103, and hydrogen that meets the preset purity is obtained and stored.

[0117] Based on the transmission of hydrogen through the first flow channel 700, multiple drying towers are added to purify the hydrogen through the second flow channel 800, and hydrogen that meets the preset purity is used to restore the adsorption function of the drying tower through the third flow channel. The three flow channels cooperate and switch with each other according to the purity of the hydrogen, thereby reducing the process flow of hydrogen purification and improving the purification efficiency.

[0118] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0119] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A hydrogen purification control system, characterized in that: include: A drying tower group, with at least three drying towers, each of which is arranged at a preset interval, for adsorbing impurities in hydrogen and receiving hydrogen meeting a preset purity to restore the adsorption function of the drying tower; A hydrogen storage component is arranged along the direction in which the drying tower outputs hydrogen, and is used to detect the purity of the hydrogen and store hydrogen that meets a preset purity; A valve group is arranged at the inlet and outlet of the drying tower group, and is used to realize the first flow channel, the second flow channel and the third flow channel, wherein, in the first flow channel, any one of the drying towers is connected to the hydrogen storage assembly to transmit hydrogen to the hydrogen storage assembly; in the second flow channel, any number of the drying towers are connected to each other to make the hydrogen reach a preset purity; in the third flow channel, among any number of the drying towers, any one of the drying towers receives hydrogen that meets the preset purity and is connected to any other one of the drying towers to restore the adsorption function of any drying tower that does not have the adsorption function.

2. The hydrogen purification control system according to claim 1, characterized in that: The valve group comprises: A pneumatic ball valve group, arranged at the inlet and outlet of the drying tower group, for controlling the input and output of the hydrogen into and out of the drying tower group; A pneumatic three-way valve group is arranged between the pneumatic ball valve group and the hydrogen storage assembly along the transmission direction of hydrogen in the first flow channel, and is used to connect the first flow channel and the third flow channel, transmit the hydrogen to the hydrogen storage assembly through the first flow channel, and transmit the hydrogen meeting the preset purity to the drying tower group through the second flow channel.

3. The hydrogen purification control system according to claim 2, characterized in that: The pneumatic ball valve assembly comprises: A first valve group, disposed at the inlet and outlet of the drying tower group, for controlling the flow of hydrogen in the first flow channel into and out of the drying tower group, so as to achieve the transmission of hydrogen to the hydrogen storage assembly; A second valve group, arranged at the inlet and outlet of the drying tower group, is used to control the flow of hydrogen in the second flow channel into and out of the drying tower group, so as to realize the transmission of hydrogen between any number of drying towers; The third valve group is arranged at the inlet and outlet of each drying tower in the drying tower group, and is used to control the hydrogen in the third flow channel to enter and exit the drying tower group, so as to realize the recovery adsorption function of the drying tower.

4. The hydrogen purification control system according to claim 1, characterized in that: The hydrogen purification control system also includes: A flow monitoring component is arranged at the inlet and outlet of the drying tower group along the transmission direction of the hydrogen in the first flow channel and the third flow channel, and is used to detect the flow data of hydrogen flowing into the drying tower group from the first flow channel and the flow data of hydrogen flowing into the drying tower group from the third flow channel; A temperature monitoring component is arranged at the inlet and outlet of the drying tower group along the transmission direction of the hydrogen in the first flow channel and the third flow channel, and is used to detect the temperature of the hydrogen flowing out of the drying tower group in the first flow channel and the temperature of the hydrogen flowing into the drying tower group in the third flow channel; A temperature regulating component is disposed between the hydrogen storage component and the valve group along the direction of hydrogen transmission in the second flow channel, and is used to regulate the hydrogen meeting the preset purity to a preset temperature.

5. The hydrogen purification control system according to claim 4, characterized in that: The temperature regulating component comprises: a heating component, disposed between the hydrogen storage component and the flow monitoring component located in the third flow channel along the transmission direction of the hydrogen in the third flow channel, and used for heating the hydrogen meeting the preset purity to a first preset temperature; A cooling component is arranged between the valve group and the flow monitoring component located in the first flow channel along the transmission direction of the hydrogen in the third flow channel, and is used to cool the heated hydrogen to a second preset temperature.

6. The hydrogen purification control system according to claim 5, characterized in that: The temperature regulating component further comprises: A gas-liquid separator is arranged between the cooling assembly and the valve group along the transmission direction of the hydrogen in the third flow channel, and is used to separate water from the hydrogen that reaches the second preset temperature.

7. The hydrogen purification control system according to claim 1, characterized in that: The hydrogen storage assembly comprises: A hydrogen storage component, disposed at the end of the first flow channel, for storing hydrogen; A hydrogen purity analysis component is disposed between the hydrogen storage component and the valve group along the transmission direction of the hydrogen in the first flow channel, and is used to detect the purity of the hydrogen.

8. A method for purifying hydrogen, characterized in that: The method is applied to the hydrogen purification control system according to any one of claims 1 to 7, comprising: Acquire historical operation data of a drying tower group, and determine a drying tower to be adsorbed and a drying tower to be regenerated in the drying tower group; Opening the first flow channel corresponding to the drying tower to be adsorbed, so that the hydrogen is transmitted to the hydrogen storage component for testing to obtain the purity of the hydrogen; If the purity is greater than or equal to the preset purity, the hydrogen is stored, and the third flow channel corresponding to the drying tower to be regenerated is opened to transmit the hydrogen meeting the preset purity to the drying tower to be regenerated, so that the drying tower to be regenerated has the adsorption function again; If the purity is less than the preset purity, the hydrogen that does not meet the preset purity is emptied, the number of the drying towers to be adsorbed is adjusted, and the second flow channel corresponding to each of the drying towers to be adsorbed is opened to allow the hydrogen to pass through the number of adsorption towers to obtain hydrogen that meets the preset purity.

9. The method for purifying hydrogen according to claim 8, characterized in that: The step of opening the third flow channel corresponding to the drying tower to be regenerated and transmitting the hydrogen meeting the preset purity to the drying tower to be regenerated so that the drying tower to be regenerated has an adsorption function again includes: The heating component is turned on to heat the hydrogen meeting the preset purity to a first preset temperature. When the temperature monitoring component detects that the temperature of the hydrogen reaches the first preset temperature and the flow component detects that the flow of the hydrogen at the first preset temperature accumulates to the first preset flow, the heating component is turned off and the hydrogen is transmitted to the drying tower to be regenerated; Turning on the cooling component to cool the hydrogen at the first preset temperature that has passed through the drying tower to be regenerated to a second preset temperature, and performing gas-liquid separation on the hydrogen at the second preset temperature in the gas-liquid separation component to precipitate water in the hydrogen at the second preset temperature to obtain regenerated hydrogen; The regenerated hydrogen is transmitted along the third flow channel to the drying tower to be regenerated. When the temperature monitoring component on the first flow channel monitors that the temperature of the regenerated hydrogen reaches a third preset temperature, the drying tower to be regenerated has an adsorption function again.

10. The method for purifying hydrogen according to claim 8, characterized in that: After storing the hydrogen if the purity is greater than or equal to the preset purity, the method further includes: Based on the flow monitoring component, the accumulated adsorption flow and adsorption time of the drying tower to be adsorbed are obtained; When the accumulated adsorption flow is greater than or equal to the second preset flow and the adsorption time is greater than or equal to the preset adsorption time, the current drying tower is closed, and based on the valve group, the first flow channel of any drying tower with adsorption capacity is opened to continuously purify the hydrogen.

11. The method for purifying hydrogen according to claim 10, characterized in that: After closing the current drying tower and opening the first flow channel of any drying tower with adsorption capacity based on the valve group, the method further includes: If the second flow channel of the closed drying tower is in an open state, the second flow channel corresponding to any of the drying towers with adsorption capacity is opened, so that the drying tower with the second flow channel opened maintains hydrogen purification.

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