Hydrogenation process

Abstract

The present disclosure relates to a hydrogenation method, which comprises a high-pressure compressor, a high-pressure hydrogenation machine, a low-pressure compressor, a low-pressure hydrogenation machine, a high-pressure hydrogen storage container and a low-pressure hydrogen storage container; wherein the high-pressure compressor is communicated with a hydrogen source, and the high-pressure compressor is connected with the high-pressure hydrogenation machine through a first high-pressure pipeline; the low-pressure compressor is communicated with the hydrogen source, and the low-pressure compressor is connected with the low-pressure hydrogenation machine through a first low-pressure pipeline; the low-pressure hydrogen storage container is communicated with the low-pressure hydrogenation machine through a second low-pressure pipeline; the high-pressure hydrogen storage container is communicated with the high-pressure hydrogenation machine through a second high-pressure pipeline, and the low-pressure hydrogen storage container is communicated with the high-pressure compressor through a third pipeline. The present disclosure solves the problem that the existing hydrogenation to the vehicle-mounted hydrogen storage system takes a long time and the compression energy consumption of the compressor is high.

Description

Technical Field

[0001] This disclosure relates to the field of hydrogenation technology, and more specifically, to a hydrogenation method. Background Technology

[0002] Currently, hydrogen refueling stations are divided into two pressure levels: low pressure and high pressure. Due to market conditions, most hydrogen refueling stations in China are low pressure stations, which makes it difficult for these stations to refuel high pressure on-board hydrogen storage systems.

[0003] Currently, some hydrogen refueling stations use high-pressure compressors connected to the refueling machines to pressurize the hydrogen supplied by the station and then inject it into the on-board hydrogen storage system, thus meeting the refueling requirements of high-pressure on-board hydrogen storage systems. However, this method requires the high-pressure compressor to compress the hydrogen each time it is refueled into the high-pressure on-board hydrogen storage system, resulting in high energy consumption of the high-pressure compressor and a relatively long refueling time. Summary of the Invention

[0004] The purpose of this disclosure is to provide a hydrogen refueling method that solves the problems of long refueling times and high compression energy consumption of compressors in existing on-board hydrogen storage systems.

[0005] In order to achieve the above objectives,

[0006] This disclosure provides a hydrogenation method, comprising the following steps:

[0007] A hydrogen refueling system is provided, the hydrogen refueling system comprising a high-pressure compressor, a high-pressure hydrogen dispenser, a low-pressure compressor, a low-pressure hydrogen dispenser, a high-pressure hydrogen storage container, and a low-pressure hydrogen storage container;

[0008] The high-pressure compressor is connected to the hydrogen source and is connected to the high-pressure hydrogen dispenser through a first high-pressure pipeline; the low-pressure compressor is connected to the hydrogen source and is connected to the low-pressure hydrogen dispenser through a first low-pressure pipeline.

[0009] The low-pressure hydrogen storage container is connected to the low-pressure hydrogen dispenser via a second low-pressure pipeline;

[0010] The high-pressure hydrogen storage container is connected to the high-pressure hydrogen dispenser via a second high-pressure pipeline, and the low-pressure hydrogen storage container is connected to the high-pressure compressor via a third pipeline;

[0011] A low-pressure gas supply pipeline is connected between the low-pressure compressor and the low-pressure hydrogen storage container.

[0012] A gas source channel is connected between the high-pressure hydrogen storage container and the low-pressure compressor.

[0013] A high-pressure gas supply pipeline is provided between the high-pressure compressor and the high-pressure hydrogen storage container.

[0014] The hydrogenation system also includes a pressure detector, a first gas flow meter, and a second gas flow meter;

[0015] The pressure detector is located at the hydrogen source, the first gas flow meter is located at the high-pressure hydrogen dispenser, and the second gas flow meter is located at the low-pressure hydrogen dispenser.

[0016] Hydrogen is injected into the low-pressure hydrogen storage system via the aforementioned low-pressure hydrogen dispenser;

[0017] Hydrogen is injected into the high-pressure hydrogen storage system via the high-pressure hydrogen dispenser.

[0018] When the gas flow rate at the high-pressure hydrogen dispenser is less than the second preset high-pressure flow rate threshold, the high-pressure compressor is turned off. Before supplying gas to the high-pressure hydrogen dispenser using the high-pressure hydrogen storage container, it is determined whether the gas flow rate at the high-pressure hydrogen dispenser is less than the first preset high-pressure flow rate threshold. If it is less, the high-pressure compressor is used to obtain hydrogen from the low-pressure hydrogen storage container to supply gas to the high-pressure hydrogen dispenser.

[0019] The first preset high-pressure flow threshold is less than the second preset high-pressure flow threshold;

[0020] The step of replenishing gas into the low-pressure hydrogen storage container when the pressure inside the low-pressure hydrogen storage container is lower than a preset low-pressure threshold also includes:

[0021] Determine whether the pressure of the high-pressure hydrogen storage container is less than the suction pressure of the low-pressure hydrogen storage container. If it is less, then supply gas to the low-pressure compressor through the high-pressure hydrogen storage container.

[0022] The step of replenishing gas into the high-pressure hydrogen storage container when the pressure inside the container is lower than a preset high-pressure threshold also includes:

[0023] Detect the pressure at the hydrogen source;

[0024] Determine whether the pressure at the hydrogen source is higher than a preset pressure threshold. If it is not higher, then use the low-pressure hydrogen storage container to supply gas to the high-pressure compressor to replenish the high-pressure hydrogen storage container.

[0025] Optionally, injecting hydrogen into the low-pressure hydrogen storage system via the low-pressure hydrogen dispenser includes:

[0026] Detect the pressure at the hydrogen source;

[0027] Determine whether the pressure at the hydrogen source is greater than the pressure in the low-pressure hydrogen storage system. If it is greater, start the low-pressure compressor to obtain hydrogen from the hydrogen source, and inject hydrogen into the low-pressure hydrogen storage system through the low-pressure hydrogen dispenser, and detect the gas flow rate at the low-pressure hydrogen dispenser.

[0028] When the gas flow rate of the low-pressure hydrogen dispenser is less than the preset low-pressure flow rate threshold, the low-pressure compressor is shut down, and the low-pressure hydrogen storage container is used to supply gas to the low-pressure hydrogen dispenser.

[0029] Optionally, the injection of hydrogen into the high-pressure hydrogen storage system via the high-pressure hydrogen injector includes:

[0030] Detect the pressure at the hydrogen source;

[0031] Determine whether the pressure at the hydrogen source is greater than the pressure inside the high-pressure hydrogen storage system. If it is greater, start the high-pressure compressor to obtain hydrogen from the hydrogen source, and inject hydrogen into the high-pressure hydrogen storage system through the high-pressure hydrogen dispenser, and detect the gas flow rate at the high-pressure hydrogen dispenser.

[0032] When the gas flow rate at the high-pressure hydrogen dispenser is less than the second preset high-pressure flow rate threshold, the high-pressure compressor is shut down, and the high-pressure hydrogen storage container is used to supply gas to the high-pressure hydrogen dispenser.

[0033] Optionally, the hydrogenation method further includes:

[0034] When the pressure inside the low-pressure hydrogen storage container is lower than a preset low-pressure threshold, gas is added to the low-pressure hydrogen storage container.

[0035] When the pressure inside the high-pressure hydrogen storage container is lower than a preset high-pressure threshold, gas is added to the high-pressure hydrogen storage container.

[0036] Optionally, the step of replenishing gas into the low-pressure hydrogen storage container when the pressure inside the low-pressure hydrogen storage container is lower than a preset low-pressure threshold includes:

[0037] The low-pressure compressor is turned on to obtain hydrogen from the hydrogen source and to replenish the low-pressure hydrogen storage container through the low-pressure compressor.

[0038] Optionally, the step of replenishing gas into the high-pressure hydrogen storage container when the pressure inside the high-pressure hydrogen storage container is lower than a preset high-pressure threshold includes:

[0039] The high-pressure compressor is turned on to obtain hydrogen from the hydrogen source and to replenish the high-pressure hydrogen storage container through the high-pressure compressor.

[0040] By employing the aforementioned technical solution, and utilizing a high-pressure compressor, a high-pressure hydrogen dispenser, a low-pressure compressor, a low-pressure hydrogen dispenser, a high-pressure hydrogen storage container, and a low-pressure hydrogen storage container, hydrogen can be added to both the high-pressure and low-pressure hydrogen storage systems separately. Furthermore, the hydrogen addition method can be adjusted in real-time during the process, allowing for rapid filling of both systems and improving efficiency. Simultaneously, the energy consumption of the high-pressure and low-pressure compressors can be relatively reduced, thus minimizing resource waste.

[0041] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0042] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0043] Figure 1 This is a schematic diagram of the overall structure of the hydrogenation system provided in an embodiment of this disclosure.

[0044] Explanation of reference numerals in the attached figures

[0045] 1. Hydrogen source; 11. Pressure detector; 12. Low-pressure gas supply pipeline; 13. High-pressure gas supply pipeline; 2. High-pressure compressor; 21. First high-pressure pipeline; 22. Second high-pressure pipeline; 23. Gas source channel; 24. High-pressure gas replenishment pipeline; 3. High-pressure hydrogen dispenser; 31. First gas flow meter; 4. Low-pressure compressor; 41. First low-pressure pipeline; 42. Second low-pressure pipeline; 43. Third pipeline; 44. Low-pressure gas replenishment pipeline; 5. Low-pressure hydrogen dispenser; 51. Second gas flow meter; 6. High-pressure hydrogen storage container; 7. Low-pressure hydrogen storage container. Detailed Implementation

[0046] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0047] This disclosure provides a hydrogenation system, such as Figure 1As shown, the hydrogen refueling system includes a high-pressure compressor 2, a high-pressure hydrogen dispenser 3, a low-pressure compressor 4, a low-pressure hydrogen dispenser 5, a high-pressure hydrogen storage container 6, and a low-pressure hydrogen storage container 7. The high-pressure compressor 2 is connected to a hydrogen source 1 via a high-pressure gas supply pipe 13, allowing the hydrogen source 1 to supply hydrogen to the high-pressure compressor 2 through the high-pressure gas supply pipe 13. Furthermore, the high-pressure compressor 2 is connected to the high-pressure hydrogen dispenser 3 via a first high-pressure pipe 21, allowing the hydrogen compressed by the high-pressure compressor 2 to be input into the high-pressure hydrogen dispenser 3, thereby injecting hydrogen into the high-pressure hydrogen storage system through the high-pressure hydrogen dispenser 3.

[0048] In addition, the aforementioned low-pressure compressor 4 is connected to the hydrogen source 1 through the low-pressure gas supply pipe 12, and the low-pressure compressor 4 is connected to the low-pressure hydrogen dispenser 5 through the first low-pressure pipe 41, so that the hydrogen source 1 can input hydrogen to the low-pressure compressor 4 through the low-pressure gas supply pipe 12, and use the low-pressure compressor 4 to compress the hydrogen and input it into the low-pressure hydrogen dispenser 5, thereby using the low-pressure hydrogen to inject hydrogen into the low-pressure hydrogen storage system;

[0049] Furthermore, the aforementioned low-pressure hydrogen storage container 7 is connected to the low-pressure hydrogen dispenser 5 via the second low-pressure pipeline 42. The aforementioned high-pressure hydrogen storage container 6 is connected to the high-pressure hydrogen dispenser 3 via the second high-pressure pipeline 22, and the low-pressure hydrogen storage container 7 is connected to the high-pressure compressor 2 via the third pipeline 43.

[0050] With the above-described structure, when adding hydrogen to the low-pressure hydrogen storage system, the low-pressure compressor 4 can be turned on, and hydrogen source 1 can be used to input hydrogen into the low-pressure compressor 4, so that the low-pressure compressor 4 compresses the hydrogen, thereby adding hydrogen to the low-pressure hydrogen storage system through the low-pressure hydrogen dispenser 5. After injecting a certain amount of hydrogen into the low-pressure hydrogen storage system, the low-pressure compressor 4 can be turned off, and hydrogen can be injected into the low-pressure hydrogen storage system using the low-pressure hydrogen storage container 7. Since the hydrogen in the low-pressure hydrogen storage system is not full, its internal pressure is relatively lower than the pressure in the low-pressure hydrogen storage container 7, thus ensuring that the hydrogen in the low-pressure hydrogen storage container 7 is injected into the low-pressure hydrogen storage system. This improves the efficiency of hydrogen injection into the low-pressure hydrogen storage system and reduces the energy consumption of the compressor 4 in compressing hydrogen, saving resources.

[0051] When adding hydrogen to the high-pressure hydrogen storage system, the high-pressure compressor 2 is turned on, and hydrogen is supplied to the high-pressure compressor 2 using the hydrogen source 1. The high-pressure compressor 2 compresses the hydrogen, which is then supplied to the high-pressure hydrogen storage system via the high-pressure hydrogen dispenser 3. After injecting a certain amount of hydrogen into the high-pressure hydrogen storage system in this way, the supply of hydrogen from the hydrogen source 1 to the high-pressure compressor 2 can be stopped, and the low-pressure hydrogen storage container 7 can be turned on. The low-pressure hydrogen storage container 7 then supplies hydrogen to the high-pressure compressor 2 through the third pipe 43. Since the hydrogen in the low-pressure hydrogen storage container 7 has a high compression ratio, it is easier for the high-pressure compressor 2 to compress the hydrogen, thereby increasing the compression time and reducing the energy consumption of the high-pressure compressor 2. After supplying hydrogen to the high-pressure compressor 2 using the low-pressure hydrogen storage container 7 for a certain period, the high-pressure compressor 2 can be shut down, and hydrogen can be injected into the high-pressure hydrogen storage system using the high-pressure hydrogen storage container 6. Since the high-pressure hydrogen storage system is not yet full, its internal pressure is relatively lower than that of the high-pressure hydrogen storage container 6, ensuring that hydrogen from the low-pressure hydrogen storage container 7 is injected into the low-pressure hydrogen storage system. This further improves the efficiency of hydrogen injection into the high-pressure hydrogen storage system, while reducing the energy consumption of the high-pressure compressor 2 in compressing hydrogen, saving resources, and addressing the issue of long hydrogen refueling queues during peak refueling periods.

[0052] It should be noted that the aforementioned hydrogen source 1 can be a container used for hydrogen storage and supply within a hydrogen station, or a long-tube trailer used for hydrogen storage, etc.

[0053] In some embodiments, such as Figure 1 As shown, a low-pressure gas supply pipe 44 is connected between the low-pressure compressor 4 and the low-pressure hydrogen storage container 7.

[0054] By connecting a low-pressure gas replenishment pipeline 44 between the low-pressure compressor 4 and the low-pressure hydrogen storage container 7, hydrogen can be compressed by the low-pressure compressor 4 when the amount of hydrogen in the low-pressure hydrogen storage container 7 is insufficient, and then replenished into the low-pressure hydrogen storage container 7 through the low-pressure gas replenishment pipeline 44.

[0055] In a further embodiment, such as Figure 1 As shown, a gas source channel 23 is connected between the high-pressure hydrogen storage container 6 and the low-pressure compressor 4.

[0056] Thus, when replenishing hydrogen into the low-pressure hydrogen storage container 7, the low-pressure compressor 4 can be used to compress hydrogen gas to replenish the low-pressure hydrogen storage container 7 first. After a certain amount of hydrogen gas is added, the high-pressure hydrogen storage container 6 can be used to replenish the low-pressure hydrogen storage container 7, thereby facilitating the rapid filling of the low-pressure hydrogen storage container 7.

[0057] In some embodiments, such as Figure 1 As shown, a high-pressure gas supply pipe 24 is connected between the high-pressure compressor 2 and the high-pressure hydrogen storage container 6.

[0058] By connecting the high-pressure compressor 2 and the high-pressure hydrogen storage container 6 with the high-pressure gas replenishment pipeline 24, when the amount of hydrogen in the high-pressure hydrogen storage container 6 is insufficient, the high-pressure compressor 2 can compress hydrogen to replenish the high-pressure hydrogen storage container 6 through the high-pressure gas replenishment pipeline 24.

[0059] Furthermore, due to the third pipeline 43 installed between the low-pressure hydrogen storage container 7 and the high-pressure compressor 2, after a certain period of compression and replenishment of hydrogen by supplying hydrogen to the high-pressure compressor 2 using the hydrogen source 1, hydrogen can be supplied from the low-pressure hydrogen storage container 7 to the high-pressure compressor 2. This allows the high-pressure compressor 2 to compress the hydrogen supplied from the low-pressure hydrogen storage container 7, thus replenishing the high-pressure hydrogen storage container 6. In this way, the compression ratio of the high-pressure compressor 2 can be relatively reduced, lowering the cost of the compression equipment, while simultaneously improving the efficiency of replenishing hydrogen to the high-pressure hydrogen storage container 6.

[0060] In some embodiments, such as Figure 1 As shown, the above-mentioned hydrogen refueling system may also include a pressure detector 11, a first gas flow meter 31, and a second gas flow meter 51. The pressure detector 11 is located at the hydrogen source 1, the first gas flow meter 31 is located at the high-pressure hydrogen refueling machine 3, and the second gas flow meter 51 is located at the low-pressure hydrogen refueling machine 5.

[0061] In this way, the pressure detector 11 can be used to detect the pressure at the hydrogen source 1 in real time. When the hydrogen source 1 outputs hydrogen, the method of adding hydrogen to the low-pressure hydrogen storage system or the high-pressure hydrogen storage system can be determined based on the structure measured by the pressure detector 11. In addition, the flow rate of hydrogen added at the high-pressure hydrogen dispenser 3 and the second hydrogen dispenser can be monitored in real time using the first flow meter and the second flow meter. Therefore, the specific method of hydrogen addition can be used based on the flow rate information of hydrogen added at the high-pressure hydrogen dispenser 3 and the second hydrogen dispenser.

[0062] It should be noted that valves are installed on the aforementioned low-pressure gas supply pipeline 12, high-pressure gas supply pipeline 13, first high-pressure pipeline 21, second high-pressure pipeline 22, gas source channel 23, high-pressure gas replenishment pipeline 24, first low-pressure pipeline 41, second low-pressure pipeline 42, third pipeline 43, and low-pressure gas replenishment pipeline 44, so that the corresponding valves can be opened when needed.

[0063] Based on the same technical concept, this disclosure also provides a hydrogenation method, which includes the following steps.

[0064] In step S10, a hydrogenation system is provided, which is the hydrogenation system as described in the above embodiments.

[0065] In step S20, hydrogen is injected into the low-pressure hydrogen storage system through the low-pressure hydrogen injector 5.

[0066] In step S30, hydrogen is injected into the high-pressure hydrogen storage system using the high-pressure hydrogen injector 3.

[0067] After providing the above-mentioned hydrogen refueling system, when it is necessary to refuel the low-pressure hydrogen storage system, the low-pressure hydrogen refueling machine 5 can be used to refuel the low-pressure hydrogen storage system. Similarly, when it is necessary to refuel the high-pressure hydrogen storage system, the high-pressure hydrogen refueling machine 3 can be used to refuel the high-pressure hydrogen storage system.

[0068] In step S20, the above-mentioned method of injecting hydrogen into the low-pressure hydrogen storage system using the low-pressure hydrogen injector 5 includes the following steps.

[0069] In step S201, the pressure at the hydrogen source 1 is detected.

[0070] In this step, the pressure at the hydrogen source 1 can be detected using a pressure detector 11 located at the hydrogen source 1.

[0071] In step S202, it is determined whether the pressure at the hydrogen source 1 is greater than the pressure in the low-pressure hydrogen storage system. If it is greater, the low-pressure compressor 4 is turned on to obtain hydrogen from the hydrogen source 1, so as to inject hydrogen into the low-pressure hydrogen storage system through the low-pressure hydrogen dispenser 5, and the gas flow rate at the low-pressure hydrogen dispenser 5 is detected.

[0072] In this step, the pressure inside the low-pressure hydrogen storage system can be obtained first. For example, for an on-board hydrogen storage system, the amount of hydrogen and the internal pressure will be displayed inside the vehicle. This allows it to be compared with the pressure information at hydrogen source 1.

[0073] Then, during the process of injecting hydrogen into the low-pressure hydrogen storage system by starting the low-pressure compressor 4, the flow rate of hydrogen output in the low-pressure hydrogen dispenser 5 can be detected by the second gas flow meter 51.

[0074] In step S203, when the gas flow rate of the low-pressure hydrogen dispenser 5 is less than the preset low-pressure flow rate threshold, the low-pressure compressor 4 is turned off, and the low-pressure hydrogen storage container 7 is used to supply gas to the low-pressure hydrogen dispenser 5.

[0075] In this step, a preset low-pressure flow rate threshold can be set in advance. When the gas flow rate output by the low-pressure hydrogen dispenser 5 is less than the preset low-pressure flow rate threshold, it indicates that the hydrogen gas charged into the low-pressure hydrogen storage system has reached a certain amount. At this time, the speed of injecting hydrogen gas into the system by compressing hydrogen gas using the low-pressure compressor 4 is relatively slow. Therefore, the hydrogen gas stored in the low-pressure hydrogen storage container 7 can be used to supply gas to the low-pressure hydrogen dispenser 5 to charge the low-pressure hydrogen storage system, which can facilitate the rapid filling of the low-pressure hydrogen storage system and improve the charging efficiency.

[0076] In some embodiments, in step S30, the method of injecting hydrogen into the high-pressure hydrogen storage system using the high-pressure hydrogen injector 3 includes the following steps.

[0077] In step S301, the pressure at hydrogen source 1 is detected.

[0078] In this step, the pressure at the hydrogen source 1 is detected using a pressure detector 11 located at the hydrogen source 1.

[0079] In step S302, it is determined whether the pressure at the hydrogen source 1 is greater than the pressure in the high-pressure hydrogen storage system. If it is greater, the high-pressure compressor 2 is turned on to obtain hydrogen from the hydrogen source 1, so as to inject hydrogen into the high-pressure hydrogen storage system through the high-pressure hydrogen dispenser 3, and the gas flow rate at the high-pressure hydrogen dispenser 3 is detected.

[0080] In this step, the pressure inside the high-pressure hydrogen storage system can be obtained first and compared with the pressure value at hydrogen source 1. If the pressure at hydrogen source 1 is higher, the high-pressure compressor 2 can be turned on to inject hydrogen into the high-pressure hydrogen storage system.

[0081] Then, during the process of injecting hydrogen into the high-pressure hydrogen storage system by starting the high-pressure compressor 2, the flow rate of hydrogen output in the high-pressure hydrogen dispenser 3 can be detected by the first gas flow meter 31.

[0082] In step S303, when the gas flow rate at the high-pressure hydrogen dispenser 3 is less than the second preset high-pressure flow rate threshold, the high-pressure compressor 2 is turned off, and the high-pressure hydrogen storage container 6 supplies gas to the high-pressure hydrogen dispenser 3.

[0083] In this step, a second preset high-pressure flow threshold can be pre-set. When the gas flow rate output by the high-pressure hydrogen dispenser 3 is less than the second preset high-pressure flow threshold, it indicates that the hydrogen gas charged into the high-pressure hydrogen storage system has reached a certain amount. At this time, the speed of injecting hydrogen gas into the high-pressure hydrogen storage system by compressing hydrogen gas using the high-pressure compressor 2 is relatively slow. Therefore, the hydrogen gas stored in the high-pressure hydrogen storage container 6 can be used to supply gas to the high-pressure hydrogen dispenser 3 to charge the high-pressure hydrogen storage system, thereby facilitating the rapid filling of the high-pressure hydrogen storage system, improving the charging efficiency, and reducing the energy consumption of the high-pressure compressor 2 during charging.

[0084] In a further embodiment, after step 302 above, that is, when the gas flow rate at the high-pressure hydrogen dispenser 3 is less than the second preset high-pressure flow rate threshold, the high-pressure compressor 2 is turned off, and before the high-pressure hydrogen storage container 6 supplies gas to the high-pressure hydrogen dispenser 3, it is determined whether the gas flow rate at the high-pressure hydrogen dispenser 3 is less than the first preset high-pressure flow rate threshold. If it is less, hydrogen gas is obtained from the low-pressure hydrogen storage container 7 using the high-pressure compressor 2 to supply gas to the high-pressure hydrogen dispenser 3. Herein, the first preset high-pressure flow rate threshold is less than the second preset high-pressure flow rate threshold.

[0085] Using this method, after step 302 and before step 303, a first preset high-pressure flow threshold can be pre-set. When the gas flow rate at the high-pressure hydrogen dispenser 3 is less than the first preset high-pressure flow threshold, the low-pressure hydrogen storage container 7 can be used as the hydrogen source 1 to input hydrogen into the high-pressure compressor 2. This facilitates the high-pressure compressor 2 to compress the hydrogen to a certain compression ratio before inputting it into the high-pressure hydrogen dispenser, thereby reducing the energy consumption of the high-pressure compressor 2 in compressing hydrogen and improving the filling efficiency. When the gas flow rate at the high-pressure hydrogen dispenser 3 is less than the second preset high-pressure flow threshold in this step, hydrogen is injected into the high-pressure hydrogen dispenser 3 using the high-pressure hydrogen storage container 6.

[0086] In some embodiments, the above hydrogenation method further includes the following steps.

[0087] In step S40, when the pressure inside the low-pressure hydrogen storage container 7 is lower than the preset low-pressure threshold, gas is added to the low-pressure hydrogen storage container 7.

[0088] In this step, a preset low-pressure threshold can be set in advance. Then, a pressure measuring instrument can be used to detect the pressure inside the low-pressure hydrogen storage container 7 in real time. When the detected pressure is lower than the preset low-pressure threshold, it indicates that the amount of hydrogen in the low-pressure hydrogen storage container 7 is relatively low, and at this time, it is necessary to add gas to it.

[0089] In step S50, when the pressure inside the high-pressure hydrogen storage container 6 is lower than the preset high-pressure threshold, gas is added to the high-pressure hydrogen storage container 6.

[0090] In this step, a preset high-pressure threshold can be set in advance. Then, a pressure measuring instrument can be used to detect the pressure inside the high-pressure hydrogen storage container 6 in real time. When the detected pressure is lower than the preset high-pressure threshold, it indicates that the amount of hydrogen in the high-pressure hydrogen storage container 6 is relatively low, and at this time, it is necessary to add gas to it.

[0091] In some embodiments, in step S40 above, when the pressure inside the low-pressure hydrogen storage container 7 is lower than a preset low-pressure threshold, the method of replenishing gas into the low-pressure hydrogen storage container 7 includes the following:

[0092] Step S401: Turn on the low-pressure compressor 4 to obtain hydrogen from the hydrogen source 1, and replenish the low-pressure hydrogen storage container 7 through the low-pressure compressor 4.

[0093] Through this step, hydrogen from hydrogen source 1 can be obtained and compressed using low-pressure compressor 4, and then the compressed hydrogen can be input into low-pressure hydrogen storage container 7 to replenish the low-pressure hydrogen storage container 7.

[0094] Furthermore, the method of replenishing gas into the low-pressure hydrogen storage container 7 when the pressure inside the low-pressure hydrogen storage container 7 is lower than the preset low-pressure threshold also includes...

[0095] Step S402: Determine whether the pressure of the high-pressure hydrogen storage container 6 is less than the suction pressure of the low-pressure hydrogen storage container 7. If it is less, then supply gas to the low-pressure compressor 4 through the high-pressure hydrogen storage container 6.

[0096] In this step, pressure testing instruments are used to detect the pressure of the high-pressure hydrogen storage container 6 and the low-pressure hydrogen storage container 7 respectively, to determine whether the pressure of the high-pressure hydrogen storage container 6 is less than the suction pressure of the low-pressure hydrogen storage container 7. If it is less, gas can be supplied to the low-pressure compressor 4 through the high-pressure hydrogen storage container 6. Since the hydrogen in the high-pressure hydrogen storage container 6 has a high compression ratio at this time, it is convenient to quickly replenish the low-pressure hydrogen storage container 7, thereby improving the replenishment efficiency. Especially during peak refueling, using this method to replenish the low-pressure hydrogen storage container 7 can relatively reduce the problem of long queuing time for refueling personnel.

[0097] In some embodiments, in step S50 above, when the pressure inside the high-pressure hydrogen storage container 6 is lower than a preset high-pressure threshold, the method of replenishing gas into the high-pressure hydrogen storage container 6 includes the following:

[0098] Step S501: Turn on the high-pressure compressor 2 to obtain hydrogen from the hydrogen source 1, and replenish the high-pressure hydrogen storage container 6 through the high-pressure compressor 2.

[0099] In this step, hydrogen from hydrogen source 1 can be obtained and compressed using high-pressure compressor 2, and then the compressed hydrogen can be input into high-pressure hydrogen storage container 6 to replenish the high-pressure hydrogen storage container 6.

[0100] Furthermore, in step S50 above, the method of replenishing gas into the high-pressure hydrogen storage container 6 when the pressure inside the high-pressure hydrogen storage container 6 is lower than a preset high-pressure threshold also includes:

[0101] Step S5021: Detect the pressure at the hydrogen source 1;

[0102] Step S5022: Determine whether the pressure at hydrogen source 1 is higher than the preset pressure threshold. If it is not higher, use the low-pressure hydrogen storage container 7 to supply gas to the high-pressure compressor 2 to replenish the high-pressure hydrogen storage container 6.

[0103] Through the above steps, a preset pressure threshold can be pre-set. When replenishing the high-pressure hydrogen storage container 6, the pressure at the hydrogen source 1 can be checked first to see if it is higher than the preset pressure threshold. If it is not higher, it means that the hydrogen supply at the hydrogen source 1 is relatively low. Therefore, the low-pressure hydrogen storage container 7 can be used to supply gas to the high-pressure compressor 2 to provide sufficient hydrogen. At the same time, the hydrogen compression efficiency in the low-pressure hydrogen storage container 7 is also relatively high, which facilitates rapid replenishment of gas into the high-pressure hydrogen storage container 6, improves the replenishment efficiency, and also reduces the compression ratio of the high-pressure compressor 2 at this time, thereby reducing the compression cost of the high-pressure compressor 2.

[0104] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0105] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0106] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hydrogenation process characterized by, The method comprises the following steps: A hydrogenation system is provided, which comprises a high-pressure compressor, a high-pressure hydrogenation machine, a low-pressure compressor, a low-pressure hydrogenation machine, a high-pressure hydrogen storage container and a low-pressure hydrogen storage container; The high-pressure compressor is in communication with a hydrogen source, and the high-pressure compressor is connected with the high-pressure hydrogenation machine through a first high-pressure pipeline; the low-pressure compressor is in communication with the hydrogen source, and the low-pressure compressor is connected with the low-pressure hydrogenation machine through a first low-pressure pipeline; The low-pressure hydrogen storage container is in communication with the low-pressure hydrogenation machine through a second low-pressure pipeline; The high-pressure hydrogen storage container is in communication with the high-pressure hydrogenation machine through a second high-pressure pipeline, and the low-pressure hydrogen storage container is in communication with the high-pressure compressor through a third pipeline; A low-pressure air supplement pipeline is connected between the low-pressure compressor and the low-pressure hydrogen storage container; A gas source channel is connected between the high-pressure hydrogen storage container and the low-pressure compressor; A high-pressure air supplement pipeline is arranged between the high-pressure compressor and the high-pressure hydrogen storage container; The hydrogenation system further comprises a pressure detector, a first gas flow meter and a second gas flow meter; The pressure detector is arranged at the hydrogen source, the first gas flow meter is arranged at the high-pressure hydrogenation machine, and the second gas flow meter is arranged at the low-pressure hydrogenation machine; Hydrogen is injected into the low-pressure hydrogen storage system through the low-pressure hydrogenation machine; Hydrogen is injected into the high-pressure hydrogen storage system through the high-pressure hydrogenation machine; When the gas flow at the high-pressure hydrogenation machine is less than a second preset high-pressure flow threshold value, the high-pressure compressor is turned off, and before the high-pressure hydrogen storage container is used to supply gas to the high-pressure hydrogenation machine, it is judged whether the gas flow at the high-pressure hydrogenation machine is less than a first preset high-pressure flow threshold value; if yes, the hydrogen in the low-pressure hydrogen storage container is obtained by using the high-pressure compressor to supply gas to the high-pressure hydrogenation machine; The first preset high-pressure flow threshold value is less than the second preset high-pressure flow threshold value; When the pressure in the low-pressure hydrogen storage container is lower than a preset low-pressure pressure threshold value, air is supplemented into the low-pressure hydrogen storage container, and the method further comprises: It is judged whether the pressure of the high-pressure hydrogen storage container is lower than the suction pressure of the low-pressure hydrogen storage container; if yes, the low-pressure compressor is supplied with gas through the high-pressure hydrogen storage container; When the pressure in the high-pressure hydrogen storage container is lower than a preset high-pressure pressure threshold value, air is supplemented into the high-pressure hydrogen storage container, and the method further comprises: The pressure at the hydrogen source is detected; It is judged whether the pressure at the hydrogen source is higher than a preset pressure threshold value; if not, the high-pressure compressor is supplied with gas by using the low-pressure hydrogen storage container to supplement air into the high-pressure hydrogen storage container.

2. The hydrogenation method according to claim 1, characterized by, The hydrogen is injected into the low-pressure hydrogen storage system through the low-pressure hydrogenation machine, which comprises: The pressure at the hydrogen source is detected; It is judged whether the pressure at the hydrogen source is higher than the pressure in the low-pressure hydrogen storage system; if yes, the low-pressure compressor is turned on to obtain hydrogen from the hydrogen source to inject hydrogen into the low-pressure hydrogen storage system through the low-pressure hydrogenation machine, and the gas flow at the low-pressure hydrogenation machine is detected; When the gas flow at the low-pressure hydrogenation machine is less than a preset low-pressure flow threshold value, the low-pressure compressor is turned off, and the low-pressure hydrogen storage container is used to supply gas to the low-pressure hydrogenation machine.

3. The hydrogenation method according to claim 1, characterized by, The hydrogen injection to the high-pressure hydrogen storage system by the high-pressure hydrogen filling machine comprises: detecting the pressure at the hydrogen source; determining whether the pressure at the hydrogen source is greater than the pressure in the high-pressure hydrogen storage system, if yes, starting the high-pressure compressor to obtain hydrogen from the hydrogen source, and injecting the hydrogen to the high-pressure hydrogen storage system by the high-pressure hydrogen filling machine, and detecting the gas flow at the high-pressure hydrogen filling machine; when the gas flow at the high-pressure hydrogen filling machine is less than a second preset high-pressure flow threshold, stopping the high-pressure compressor, and supplying gas to the high-pressure hydrogen filling machine by the high-pressure hydrogen storage container.

4. The hydrogenation method according to claim 1, characterized by, The hydrogen injection method further comprises: when the pressure in the low-pressure hydrogen storage container is lower than a preset low-pressure pressure threshold, supplementing the low-pressure hydrogen storage container with hydrogen; when the pressure in the high-pressure hydrogen storage container is lower than a preset high-pressure pressure threshold, supplementing the high-pressure hydrogen storage container with hydrogen.

5. The hydrogenation method according to claim 4, characterized by, When the pressure in the low-pressure hydrogen storage container is lower than a preset low-pressure pressure threshold, supplementing the low-pressure hydrogen storage container with hydrogen, comprising: starting the low-pressure compressor to obtain hydrogen from the hydrogen source, and supplementing the low-pressure hydrogen storage container with hydrogen by the low-pressure compressor.

6. The hydrogenation method according to claim 4, characterized by, When the pressure in the high-pressure hydrogen storage container is lower than a preset high-pressure pressure threshold, supplementing the high-pressure hydrogen storage container with hydrogen, comprising: starting the high-pressure compressor to obtain hydrogen from the hydrogen source, and supplementing the high-pressure hydrogen storage container with hydrogen by the high-pressure compressor.

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