Hydrogen storage system control method, device, medium and equipment for ammonia synthesis process

Abstract

The invention relates to a hydrogen storage system control method, a hydrogen storage system control device, a medium and equipment for a synthetic ammonia process, which can stabilize water electrolysis hydrogen production fluctuation, optimize hydrogen storage scale and improve safety and economy. The method comprises the following steps: acquiring real-time hydrogen storage pressure of a hydrogen storage system; according to the real-time hydrogen storage pressure and preset pressure parameters including a first preset pressure threshold value, a second preset pressure threshold value and a third preset pressure threshold value, the synthesis ammonia hydrogen consumption amount is controlled to be within a preset hydrogen consumption amount range, so that the hydrogen storage system reaches a target operation state, and the preset pressure parameters include the first preset pressure threshold value, the second preset pressure threshold value and the third preset pressure threshold value. The first preset pressure threshold value is smaller than the second preset pressure threshold value, and the second preset pressure threshold value is smaller than the third preset pressure threshold value.

Description

Technical Field

[0001] The present disclosure relates to the technical field of green hydrogen ammonia synthesis, and in particular, to a method, device, medium and equipment for controlling a hydrogen storage system used in a synthetic ammonia process. Background Art

[0002] In recent years, green ammonia synthesis technology that matches new energy has made initial developments. Different from traditional ammonia synthesis technology, green ammonia synthesis technology that matches new energy needs to set up a hydrogen storage system of a certain scale in the middle due to the volatility of hydrogen production in the front-end water electrolysis hydrogen production system and the adjustment speed of the back-end compression and ammonia synthesis part is not as fast as the water electrolysis hydrogen production system. The resulting hydrogen storage system scheduling and regulation system is the key. Improper regulation methods may cause the hydrogen storage system to frequently shut down due to hydrogen shortage, or hydrogen venting due to overpressure in the storage tank, and power abandonment due to reduced electrolysis capacity.

[0003] In related technologies, the wind and solar forecasting system is usually used to reversely predict the hydrogen production capacity and synthetic ammonia production capacity in advance, and the large fluctuations of the synthetic ammonia system are used to match the fluctuations of the water electrolysis hydrogen production system, which may lead to safety hazards such as reaction runaway and system overpressure. Alternatively, the hydrogen storage system is increased without limit, and various new hydrogen storage systems are added to smooth the volatility of the water electrolysis hydrogen production system, resulting in increased operating costs and safety risks. Summary of the invention

[0004] The purpose of the present disclosure is to provide a method, device, medium and equipment for controlling a hydrogen storage system for a synthetic ammonia process to solve the problems in the related art.

[0005] In order to achieve the above objectives, in a first aspect, the present disclosure provides a method for controlling a hydrogen storage system for a synthetic ammonia process, the method comprising: Obtaining the real-time hydrogen storage pressure of the hydrogen storage system; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameters, so that the hydrogen storage system reaches a target operating state, wherein the preset pressure parameters include a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

[0006] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter includes: When the real-time hydrogen storage pressure is less than or equal to the first preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to 0.

[0007] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter includes: When the real-time hydrogen storage pressure is greater than the first preset pressure threshold and less than or equal to the second preset pressure threshold, obtaining a hydrogen storage amount change value within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the hydrogen storage amount change value.

[0008] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the hydrogen storage amount change value includes: When the hydrogen storage amount change value is greater than or equal to 0, adjusting the hydrogen consumption of synthetic ammonia according to the preset hydrogen flow rate increase amplitude per unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to a first preset hydrogen consumption threshold; When the hydrogen storage capacity change value is less than 0, the synthetic ammonia hydrogen consumption is adjusted according to the preset hydrogen flow rate reduction amplitude per unit time so that the synthetic ammonia hydrogen consumption is greater than or equal to a second preset hydrogen consumption threshold, wherein the first preset hydrogen consumption threshold is greater than the second preset hydrogen consumption threshold.

[0009] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter includes: When the real-time hydrogen storage pressure is greater than the second preset pressure threshold and less than the third preset pressure threshold, obtaining a hydrogen storage amount change value within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the hydrogen storage amount change value.

[0010] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the hydrogen storage amount change value includes: When the hydrogen storage amount change value is greater than 0, adjusting the hydrogen consumption of synthetic ammonia according to the preset hydrogen flow rate increase amplitude per unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to a first preset hydrogen consumption threshold; When the hydrogen storage amount change value is less than or equal to 0, the hydrogen consumption of synthetic ammonia is controlled to be the current value.

[0011] Optionally, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter includes: When the real-time hydrogen storage pressure is greater than or equal to the third preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to the first preset hydrogen consumption threshold.

[0012] In a second aspect, the present disclosure provides a hydrogen storage system control device for a green hydrogen ammonia synthesis process, the device comprising: An acquisition module, used to acquire the real-time hydrogen storage pressure of the hydrogen storage system; A control module is used to control the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and a preset pressure parameter, so that the hydrogen storage system reaches a target operating state, wherein the preset pressure parameter includes a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

[0013] In a third aspect, the present disclosure further provides a non-temporary computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.

[0014] In a fourth aspect, the present disclosure further provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of any one of the methods in the first aspect.

[0015] Through the above technical solution, the real-time hydrogen storage pressure of the hydrogen storage system is obtained; according to the real-time hydrogen storage pressure and the preset pressure parameters, the hydrogen consumption of synthetic ammonia is controlled to be within the preset hydrogen consumption range, so that the hydrogen storage system reaches the target operating state. Among them, by monitoring the real-time pressure of the hydrogen storage system and controlling the hydrogen consumption of synthetic ammonia in intervals according to the preset pressure threshold, the hydrogen storage system can be optimized and regulated to avoid safety hazards such as overpressure or low pressure, thereby achieving the stabilization of the fluctuation of hydrogen production by electrolysis of water, optimizing the scale of hydrogen storage, and improving safety and economy.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The present invention is a flow chart showing a method for controlling a hydrogen storage system for a synthetic ammonia process according to an exemplary embodiment.

[0018] Figure 2 It is a schematic diagram of an implementation environment of a hydrogen storage system according to an exemplary embodiment.

[0019] Figure 3 It is a schematic diagram of an implementation environment of a hydrogen storage system according to an exemplary embodiment.

[0020] Figure 4 The invention is a block diagram of a control device of a hydrogen storage system for a synthetic ammonia process according to an exemplary embodiment.

[0021] Figure 5 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] As mentioned in the background technology, in the related technology, the wind and solar forecasting system is usually used to reversely predict the hydrogen production capacity and synthetic ammonia production capacity in advance, and the large fluctuations of the synthetic ammonia system are used to match the fluctuations of the electrolytic water hydrogen production system. The existing characteristics of the synthetic ammonia device are ignored, that is, the synthetic ammonia system has a complex reaction process, and the changes in reaction pressure and temperature have an impact on the reaction process. Therefore, the adjustment speed of the synthetic ammonia device has certain limitations, and it is difficult to achieve rapid and large load increases and decreases. In addition, large adjustments have brought challenges to the stability and safety of the reaction system, and there are safety hazards such as reaction runaway and system overpressure. Alternatively, the hydrogen storage system is increased without limit, and various new hydrogen storage systems are added to smooth the volatility of the electrolytic water hydrogen production system, resulting in an increase in operating costs. In addition, as a hazardous chemical, the increase in hydrogen reserves will bring safety risks.

[0024] In view of this, the embodiments of the present disclosure provide a method, device, medium and equipment for controlling a hydrogen storage system for a synthetic ammonia process, which can achieve the smoothing of fluctuations in hydrogen production by electrolysis of water, optimize the scale of hydrogen storage, and improve safety and economy.

[0025] Figure 1 is a flow chart showing a method for controlling a hydrogen storage system for a synthetic ammonia process according to an exemplary embodiment. Figure 1 As shown, the method comprises the following steps: Step S101, obtaining the real-time hydrogen storage pressure of the hydrogen storage system; Step S102, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameters, so that the hydrogen storage system reaches the target operating state, wherein the preset pressure parameters include a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

[0026] It should be understood that green hydrogen can be directly produced through renewable energy such as solar energy and wind energy, and basically no greenhouse gases are produced during its production process. Synthetic ammonia is ammonia directly synthesized from nitrogen and hydrogen under high temperature and pressure and in the presence of a catalyst, which is a basic inorganic chemical process. In the modern chemical industry, ammonia is the main raw material for the fertilizer industry and basic organic chemicals.

[0027] It should be understood that by real-time monitoring of the hydrogen storage pressure and dynamically adjusting the hydrogen consumption of synthetic ammonia according to preset pressure parameters, the system can be effectively prevented from overpressure or underpressure during the hydrogen storage process, thereby reducing safety hazards and improving the reliability of the system.

[0028] For example, the real-time hydrogen storage pressure can be calculated as shown in the following formula (1): ≈ -0.1 (1) Where P is the tank pressure (MpaG), Q is the hydrogen storage capacity (Nm 3 ), is the tank coefficient, which is approximately equal to the total water volume V (m 3 ) is inversely proportional.

[0029] For example, the preset pressure parameter can be set according to actual conditions. For example, the first preset pressure threshold can be expressed as P min , the second preset pressure threshold can be expressed as P s , the third preset pressure threshold can be expressed as P max , and the three satisfy P min <P s <P max Among them, P min It can be the minimum working pressure of the hydrogen storage tank group. The specific value is related to the compressor selection; P max It can be the maximum working pressure of the hydrogen storage tank group. The specific value is related to the compressor selection; P s It can be a function of the wind and solar power output data. When the wind and solar power output is large, it should be close to P min When the wind and solar power output is small, it should be close to P max , so as to increase hydrogen consumption as much as possible when the wind and solar power output is large, and reduce hydrogen consumption as much as possible when the wind and solar power output is small.

[0030] For example, regarding the second preset pressure threshold P s It can be shown by the following calculation formula (2): (2) in, It can be the average value of the predicted value integration of the wind and solar power output prediction data for the past period of time (ranging from tens of minutes to several days), the real-time value, or the future period of time (ranging from tens of minutes to several days). Its function characteristics can be shown by the following calculation formulas (3) and (4): (3) (4) Among them, M 风 is the wind power installed capacity, M 光 is the photovoltaic installed capacity, α 风 is the wind output per unit value (0-1), α 光 It is the light output per unit value (0-1).

[0031] For example, the second preset pressure threshold P is calculated as shown in the following formula (5): s The above characteristics can be met: (5) Through the above method, the real-time hydrogen storage pressure of the hydrogen storage system is obtained; according to the real-time hydrogen storage pressure and the preset pressure parameter, the hydrogen consumption of synthetic ammonia is controlled to be within the preset hydrogen consumption range, so that the hydrogen storage system reaches the target operating state. Among them, by monitoring the real-time pressure of the hydrogen storage system and controlling the hydrogen consumption of synthetic ammonia in intervals according to the preset pressure threshold, the hydrogen storage system can be optimized and regulated to avoid safety hazards such as overpressure or low pressure, thereby achieving the stabilization of the fluctuation of hydrogen production by electrolysis of water, optimizing the scale of hydrogen storage, and improving safety and economy.

[0032] In a possible implementation, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter may include: When the real-time hydrogen storage pressure is less than or equal to the first preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to 0.

[0033] It should be understood that when the hydrogen storage pressure is lower than the first preset pressure threshold, the hydrogen consumption of synthetic ammonia is limited to zero. This protection mechanism ensures that synthetic ammonia production will not be carried out when hydrogen reserves are insufficient, which helps to ensure the stability and safety of the system.

[0034] For example, controlling the oxygen content of synthetic ammonia to 0 can be achieved by operating the synthetic tower. Specifically, a large valve can be set before the cold air enters the heat exchanger in the ammonia synthesis circle, and a large valve can be set after the hot air exits the heat exchanger. When the tower is sealed, these two large valves are closed, and the cold shock gas such as the interlayer and annular gap is closed at the same time. The synthetic ammonia system is shut down to store heat, and the synthesis system is not cooled to room temperature (anything that can achieve similar functions is acceptable). In addition, the tower can generally store heat for 1-7 days, and the synthetic ammonia system does not need to be heated for a long time when it is started again, thereby reducing the start-up time and energy consumption.

[0035] In a possible implementation, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter may include: When the real-time hydrogen storage pressure is greater than a first preset pressure threshold and less than or equal to a second preset pressure threshold, obtaining a change value of the hydrogen storage amount within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the change in hydrogen storage amount.

[0036] Wherein, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the change value of the hydrogen storage amount may include: When the hydrogen storage amount change value is greater than or equal to 0, the hydrogen consumption of synthetic ammonia is adjusted according to the preset hydrogen flow rate increase within a unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to the first preset hydrogen consumption threshold; When the hydrogen storage capacity change value is less than 0, the hydrogen consumption for synthesizing ammonia is adjusted according to the preset hydrogen flow rate reduction amplitude per unit time so that the hydrogen consumption for synthesizing ammonia is greater than or equal to a second preset hydrogen consumption threshold, wherein the first preset hydrogen consumption threshold is greater than the second preset hydrogen consumption threshold.

[0037] It should be understood that when the real-time hydrogen storage pressure is greater than the first preset pressure threshold and less than or equal to the second preset pressure threshold, the hydrogen consumption of synthetic ammonia can be reduced to achieve storage and pressure accumulation of hydrogen, but the pressure in the storage tank must not rise too quickly. Therefore, when the hydrogen storage capacity increases, it is necessary to increase the load, that is, to increase the oxygen consumption of synthetic ammonia.

[0038] For example, the change in hydrogen storage capacity at time t can be expressed by the following calculation formula (6): (6) in, is the change in hydrogen storage at time t, F 制氢t is the amount of hydrogen produced at time t, F 合成氨t is the synthetic ammonia production at time t, that is, the amount of hydrogen consumed for synthetic ammonia, For the time interval.

[0039] For example, the hydrogen storage capacity at time t can be calculated as shown in the following formula (7): (7) in, is the hydrogen storage capacity at time t, is the hydrogen storage capacity at the moment before time t, is the change in hydrogen storage capacity at time t.

[0040] For example, the increase or decrease of hydrogen flow rate corresponding to the specified adjustment speed under a single adjustment range can be shown in the following calculation formula (8) and calculation formula (9): (8) (9) Where, ∆F 升 is the increase in hydrogen ∆t gas flow rate under a single adjustment range, ∆F 降 F is the reduction of hydrogen flow rate under a single adjustment range. 额定 is the rated hydrogen consumption of the synthetic ammonia unit, γ 升 is the allowable increase within 2 hours (%), γ 降 The allowable rise and fall within 2 hours (%), is the adjustment time interval (h). For example, the specific value may be the average value of the integral value between 5s and 15min according to the actual situation.

[0041] For example, the preset increase range of the hydrogen flow rate and the preset decrease range of the hydrogen flow rate can be set according to the design parameters provided by the equipment manufacturer, and the embodiments of the present disclosure are not limited to this.

[0042] It should also be understood that the allowable range of increase and decrease per unit time of the synthetic ammonia plant may be different. The specific range can be based on the design parameters provided by the equipment manufacturer. Generally, it can be taken as 10% (rated value) / 2h (which is related to the production load range of the synthetic ammonia plant).

[0043] It should also be understood that the first preset hydrogen consumption threshold can be represented by F 2max Indicates that the second preset hydrogen consumption threshold can be represented by F 2min Specifically, F 2max It can be characterized as the maximum value of hydrogen consumption of the synthetic ammonia unit, which is about 1.05-1.1 times the rated hydrogen consumption of the unit. The specific value is related to the production capacity characteristics of the synthetic ammonia unit. 2min It can be characterized as the minimum hydrogen consumption of the ammonia synthesis unit. The specific value is related to the number of ammonia synthesis units and the minimum load of a single unit.

[0044] For example, the first preset hydrogen consumption threshold F 2min It can be expressed as follows by the following calculation formula (10): (10) Among them, F' 设计值min Design minimum load (Nm2) for a single ammonia unit of an ammonia system (consisting of one or more ammonia units) 3 / h), which can generally be 30-50% of the rated hydrogen consumption of the synthetic ammonia unit. The number of sets of parallel-connected synthetic ammonia units.

[0045] For example, the rated hydrogen consumption of the ammonia synthesis unit can be expressed by the following calculation formula (11): (11) Among them, F 额定 is the rated hydrogen consumption of the synthetic ammonia unit (Nm 3 / h), E is the production capacity of the synthetic ammonia plant (10,000 t / year), and the specific value can be 8000h / year, is the consumption of hydrogen per ton of ammonia, the specific value can be 2000Nm 3 / tNH3 (theoretical value is 1976.47Nm 3 / tNH3, taking into account certain relaxation gas losses).

[0046] In a possible implementation, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter may include: When the real-time hydrogen storage pressure is greater than the second preset pressure threshold and less than the third preset pressure threshold, obtaining a hydrogen storage amount change value within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the change in hydrogen storage amount.

[0047] Wherein, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the change value of the hydrogen storage amount may include: When the hydrogen storage amount change value is greater than 0, the hydrogen consumption of synthetic ammonia is adjusted according to the preset hydrogen flow rate increase within a unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to the first preset hydrogen consumption threshold; When the change in hydrogen storage amount is less than or equal to 0, the hydrogen consumption of synthetic ammonia is controlled to be the current value.

[0048] It should be understood that when the real-time hydrogen storage pressure is greater than the second preset pressure threshold and less than the third preset pressure threshold, the hydrogen consumption for synthetic ammonia can be increased to avoid overpressure of the hydrogen storage system, but when the hydrogen storage capacity has a downward trend, the hydrogen consumption for synthetic ammonia may not be increased and may be maintained at the current value to avoid over-adjustment and maintain stable operation of the system.

[0049] In a possible implementation, controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter may include: When the real-time hydrogen storage pressure is greater than or equal to the third preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to the first preset hydrogen consumption threshold.

[0050] It should be understood that when the hydrogen consumption of the ammonia synthesis unit is increased to the maximum value, the hydrogen production also needs to be reduced to a level equivalent to the hydrogen consumption of the ammonia synthesis, or measures such as starting the high-pressure hydrogen storage system should be taken to ensure the stability of the overall operation.

[0051] It should be understood that the present embodiment is described by taking a conventional medium- and low-pressure hydrogen storage system as an example. If other forms of hydrogen storage systems such as other liquid hydrogen are adopted, similar effects can be achieved by changing the pressure to the liquid level (reserve) or the like.

[0052] It should also be understood that the scheme in this embodiment designs a feasible hydrogen storage system and its adjustment mechanism by systematically analyzing hydrogen production → hydrogen storage → ammonia synthesis, which can achieve a better regulation effect without imposing overly harsh conditions on the adjustment speed of the ammonia synthesis device and the electrolyzer device, avoiding the safety risks that may be caused by large and rapid fluctuations in the ammonia synthesis device. It also has guiding significance for the optimization of hydrogen storage schemes, wind-solar ratio optimization, and device performance optimization of wind-solar hydrogen production and ammonia synthesis systems.

[0053] For example, when selecting a synthesis gas compressor, attention should be paid to the operating range of the compressor's inlet pressure, and a suitable compressor can be selected based on actual conditions.

[0054] Figure 2 is a schematic diagram of an implementation environment of a hydrogen storage system according to an exemplary embodiment. Figure 2 As shown, the hydrogen storage system is a conventional medium and low pressure hydrogen storage system. The new energy power source 1 transmits electricity to the hydrogen production system 2. The hydrogen production system 2 is connected to the hydrogen storage system 3, and the hydrogen storage system 3 is connected to the ammonia synthesis device 4.

[0055] It should be understood that the hydrogen production system 2 can be a water electrolysis hydrogen production system, and its power load accounts for about 90% to 95% of the overall system, while the power load of other compression, synthetic ammonia, public utilities and other systems accounts for 5% to 10% of the overall system. Therefore, the power load of the water electrolysis hydrogen production system is generally connected to the new energy (wind power and photovoltaic) power supply, while the other parts are mainly new energy electricity, supplemented by grid electricity.

[0056] For example, the renewable energy generation capacity can be calculated as shown in equations (12), (13) and (14): (12) (13) (14) Among them, W 风 is the wind power generation capacity (MW), W 光 is the wind power generation capacity (MW), M 风 is the installed capacity of wind power (MW), M 光 is the installed capacity of photovoltaic power (MW), α 风 and α 光 It is the per-unit value of wind and solar power output (0-1).

[0057] For example, the amount of hydrogen produced by water electrolysis can be calculated as shown in equations (15) and (16): When the hydrogen storage pressure at the end of the previous time interval is greater than or equal to the maximum working pressure of the hydrogen storage tank group, (15) Among them, F 制氢t is the amount of hydrogen produced during the tth time interval (Nm 3 / h), F in-t is the hydrogen flow rate entering the hydrogen storage system at the tth time interval (Nm 3 / h), F out -t is the hydrogen flow rate out of the hydrogen storage system at time interval t (Nm 3 / h), F 2max It is the maximum value of hydrogen consumption of the ammonia synthesis unit.

[0058] When the hydrogen storage pressure at the end of the previous time interval (10 minutes) is less than the maximum working pressure of the hydrogen storage tank group, (16) Among them, F 制氢t is the amount of hydrogen produced during the tth time interval (Nm 3 / h), F in-t is the hydrogen flow rate entering the hydrogen storage system at the tth time interval (Nm 3 / h), The unit power consumption for hydrogen production (kwh / Nm 3 H2), its specific value can be 4.5-5.5.

[0059] Furthermore, the constraint condition for hydrogen production can be 1min ≤F 制氢t ≤F 1max , F 1min It is the lower limit of the hydrogen production of the electrolysis device and can be set as the rated hydrogen production F 1额定 5%-30% (the load of the electrolysis system can be reduced to less than 30% by stopping some electrolytic cells); F 1max This is the upper limit of the hydrogen production of the electrolysis device, which can be set to 100%-110% of the rated hydrogen production. For details, please refer to the ordering parameters and design parameters.

[0060] For example, for a hydrogen storage system that combines high-pressure hydrogen storage with medium- and low-pressure hydrogen storage, the effect can also be achieved through the strategy of this method. Figure 3 As shown, the new energy power source 1 transmits electricity to the hydrogen production system 2, the hydrogen production system 2 is connected to the hydrogen storage system 3, and the hydrogen storage system 3 is connected to the synthetic ammonia device 4. In addition, the hydrogen storage system 3 is connected to the filling compressor 5, and the filling compressor 5 is connected to the 20MPa tube bundle vehicle 6.

[0061] It should be understood that a very small amount of hydrogen production (1%~5% of the rated hydrogen production) can be considered to be stored or delivered to customers through the filling compressor 5 when the wind and solar power output is at peak and the downstream ammonia synthesis unit 4 is limited in consumption (generally the hydrogen production peak of the water electrolysis unit ≥ the consumption peak of the ammonia synthesis unit).

[0062] It should be understood that, considering the low probability of large wind and solar output, the hydrogen production peak of the water electrolysis device is generally controlled to be slightly higher than the consumption peak of the ammonia synthesis device. When the pressure of the hydrogen storage system rises to the peak working pressure, the hydrogen production of the water electrolysis device will be reduced to the consumption peak of the ammonia synthesis device as mentioned above to avoid overpressure of the storage tank. However, at this time, the newly added filling compressor can be used to store the hydrogen production (hydrogen production peak of the water electrolysis device - consumption peak of the ammonia synthesis device) by filling it into a 20MPa tube bundle truck. At this time, the operation of the filling compressor can also reduce the power abandonment to a certain extent, but the proportion should not be too high. The main reason is that the proportion of this operating condition is low and the equipment utilization rate is relatively low. An appropriate increase can increase the flexibility of the hydrogen storage system, but too much will reduce the overall economy.

[0063] Figure 4 A hydrogen storage system control device 400 for a synthetic ammonia process is shown according to an exemplary embodiment of the present disclosure, such as Figure 4 As shown, the hydrogen storage system control device 400 includes: An acquisition module 401 is used to acquire the real-time hydrogen storage pressure of the hydrogen storage system; The control module 402 is used to control the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameters, so that the hydrogen storage system reaches the target operating state, wherein the preset pressure parameters include a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

[0064] Optionally, the control module 402 is used to: When the real-time hydrogen storage pressure is less than or equal to the first preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to 0.

[0065] Optionally, the control module 402 includes: A first acquisition submodule is used to acquire a hydrogen storage amount change value within a target time period when the real-time hydrogen storage pressure is greater than a first preset pressure threshold and less than or equal to a second preset pressure threshold; The first control submodule is used to control the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the change value of the hydrogen storage amount.

[0066] Optionally, the first control submodule is used for: When the hydrogen storage amount change value is greater than or equal to 0, the hydrogen consumption of synthetic ammonia is adjusted according to the preset hydrogen flow rate increase within a unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to the first preset hydrogen consumption threshold; When the hydrogen storage capacity change value is less than 0, the hydrogen consumption for synthesizing ammonia is adjusted according to the preset hydrogen flow rate reduction amplitude per unit time so that the hydrogen consumption for synthesizing ammonia is greater than or equal to a second preset hydrogen consumption threshold, wherein the first preset hydrogen consumption threshold is greater than the second preset hydrogen consumption threshold.

[0067] Optionally, the control module 402 includes: A second acquisition submodule is used to acquire a hydrogen storage amount change value within a target time period when the real-time hydrogen storage pressure is greater than a second preset pressure threshold and less than a third preset pressure threshold; The second control submodule is used to control the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the change value of the hydrogen storage amount.

[0068] Optionally, the second control submodule is used for: When the hydrogen storage amount change value is greater than 0, the hydrogen consumption of synthetic ammonia is adjusted according to the preset hydrogen flow rate increase within a unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to the first preset hydrogen consumption threshold; When the change in hydrogen storage amount is less than or equal to 0, the hydrogen consumption of synthetic ammonia is controlled to be the current value.

[0069] Optionally, the control module 402 is used to: When the real-time hydrogen storage pressure is greater than or equal to the third preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to the first preset hydrogen consumption threshold.

[0070] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0071] Figure 5 FIG. 5 is a block diagram of an electronic device 500 according to an exemplary embodiment. Figure 5 As shown, the electronic device 500 may include: a processor 501 , a memory 502 . The electronic device 500 may also include one or more of a multimedia component 503 , an input / output (I / O) interface 504 , and a communication component 505 .

[0072] The processor 501 is used to control the overall operation of the electronic device 500 to complete all or part of the steps in the above-mentioned hydrogen storage system control method for ammonia synthesis process. The memory 502 is used to store various types of data to support the operation of the electronic device 500, and these data may include, for example, instructions for any application or method for operating on the electronic device 500, and data related to the application. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 503 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 502 or sent through the communication component 505. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 504 provides an interface between the processor 501 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 505 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0073] In an exemplary embodiment, the electronic device 500 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned hydrogen storage system control method for the synthetic ammonia process.

[0074] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned hydrogen storage system control method for ammonia synthesis process are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 502 including program instructions, and the above-mentioned program instructions can be executed by the processor 501 of the electronic device 500 to complete the above-mentioned hydrogen storage system control method for ammonia synthesis process.

[0075] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0076] 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, the present disclosure will not further describe various possible combinations.

[0077] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for controlling a hydrogen storage system for a synthetic ammonia process, characterized in that: The method comprises: Obtain the real-time hydrogen storage pressure of the hydrogen storage system; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameters, so that the hydrogen storage system reaches a target operating state, wherein the preset pressure parameters include a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

2. The method according to claim 1, characterized in that The controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter comprises: When the real-time hydrogen storage pressure is less than or equal to the first preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to 0.

3. The method according to claim 1, characterized in that The controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter comprises: When the real-time hydrogen storage pressure is greater than the first preset pressure threshold and less than or equal to the second preset pressure threshold, obtaining a hydrogen storage amount change value within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the hydrogen storage amount change value.

4. The method according to claim 3, characterized in that The step of controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the hydrogen storage amount change value comprises: When the hydrogen storage amount change value is greater than or equal to 0, adjusting the hydrogen consumption of synthetic ammonia according to the preset hydrogen flow rate increase amplitude per unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to a first preset hydrogen consumption threshold; When the hydrogen storage capacity change value is less than 0, the synthetic ammonia hydrogen consumption is adjusted according to the preset hydrogen flow rate reduction amplitude per unit time so that the synthetic ammonia hydrogen consumption is greater than or equal to a second preset hydrogen consumption threshold, wherein the first preset hydrogen consumption threshold is greater than the second preset hydrogen consumption threshold.

5. The method according to claim 1, characterized in that The controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter comprises: When the real-time hydrogen storage pressure is greater than the second preset pressure threshold and less than the third preset pressure threshold, obtaining a hydrogen storage amount change value within a target time period; The hydrogen consumption of synthetic ammonia is controlled to be within a preset hydrogen consumption range according to the hydrogen storage amount change value.

6. The method according to claim 5, characterized in that The step of controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the hydrogen storage amount change value comprises: When the hydrogen storage amount change value is greater than 0, adjusting the hydrogen consumption of synthetic ammonia according to the preset hydrogen flow rate increase amplitude per unit time, so that the hydrogen consumption of synthetic ammonia is less than or equal to a first preset hydrogen consumption threshold; When the hydrogen storage amount change value is less than or equal to 0, the hydrogen consumption of synthetic ammonia is controlled to be the current value.

7. The method according to claim 1, characterized in that The controlling the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and the preset pressure parameter comprises: When the real-time hydrogen storage pressure is greater than or equal to the third preset pressure threshold, the hydrogen consumption of synthetic ammonia is controlled to be equal to the first preset hydrogen consumption threshold.

8. A hydrogen storage system control device for ammonia synthesis process, characterized in that: The device comprises: An acquisition module, used to acquire the real-time hydrogen storage pressure of the hydrogen storage system; A control module is used to control the hydrogen consumption of synthetic ammonia to be within a preset hydrogen consumption range according to the real-time hydrogen storage pressure and a preset pressure parameter, so that the hydrogen storage system reaches a target operating state, wherein the preset pressure parameter includes a first preset pressure threshold, a second preset pressure threshold and a third preset pressure threshold, the first preset pressure threshold is less than the second preset pressure threshold, and the second preset pressure threshold is less than the third preset pressure threshold.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

Images