Synthesis ammonia system and gas supply rate control method

Abstract

The application provides a synthetic ammonia system and a gas supply rate control method. The synthetic ammonia system comprises a hydrogen supply device, a nitrogen supply device and a controller. The hydrogen supply device prepares hydrogen according to electric energy provided by a renewable energy power generation device and supplies the hydrogen to a synthetic ammonia reaction device. The nitrogen supply device supplies nitrogen to the synthetic ammonia reaction device. The controller controls a ratio between a hydrogen supply rate of the hydrogen supply device and a nitrogen supply rate of the nitrogen supply device to be a preset ratio, so that when hydrogen production fluctuates due to renewable energy power generation fluctuation, the imbalance between hydrogen and ammonia can be avoided. The system provided by the application can still perform ammonia synthesis when renewable energy power generation fluctuates, and loss caused by system shutdown can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of synthetic ammonia, in particular to a synthetic ammonia system and a gas supply rate control method. BACKGROUND

[0002] With the development of science and technology, the products of ammonia synthesis are more and more widely used in many fields. The raw materials for preparing the products of ammonia synthesis include hydrogen and nitrogen; among them, hydrogen is usually obtained by water electrolysis technology; and electrolysis of water to produce hydrogen needs to consume a large amount of electric energy, in order to reduce pollution, renewable energy power generation can be used for water electrolysis operation.

[0003] At present, due to the volatility of renewable energy power generation, the hydrogen production of water electrolysis will also fluctuate, resulting in that the existing synthetic ammonia system cannot normally complete the ammonia synthesis operation due to the imbalance of raw material ratio, and can only be shut down for processing. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a synthetic ammonia system and a gas supply rate control method, which can normally perform ammonia synthesis operation when renewable energy power generation fluctuates. The specific scheme is as follows:

[0005] According to a first aspect of an embodiment of the present application, a synthetic ammonia system is provided, comprising:

[0006] a hydrogen supply device, a nitrogen supply device and a controller;

[0007] The hydrogen supply device is configured to prepare hydrogen according to the electric energy provided by a renewable energy power generation device, and supply the hydrogen to a synthetic ammonia reaction device;

[0008] The nitrogen supply device is configured to supply nitrogen to the synthetic ammonia reaction device;

[0009] The controller is configured to control the ratio between the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device to be a preset ratio.

[0010] The system described above, optionally, the controller is configured to:

[0011] In the case that the ratio between the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device is not the preset ratio, the nitrogen supply rate of the nitrogen supply device is adjusted so that the ratio between the hydrogen supply rate and the adjusted nitrogen supply rate is the preset ratio.

[0012] The system described above, optionally, the hydrogen supply device comprises:

[0013] The hydrogen production module, the hydrogen storage module and the hydrogen supply module;

[0014] The hydrogen production module is configured to produce hydrogen based on the electric energy provided by the renewable energy power generation device.

[0015] The hydrogen storage module is configured to store the hydrogen produced by the hydrogen production module.

[0016] The hydrogen supply module is configured to supply the hydrogen stored in the hydrogen storage module to the ammonia synthesis reaction device.

[0017] The system, optionally, the controller is configured to:

[0018] In a case where it is detected that the gas pressure in the hydrogen storage module is not within the preset first pressure range, the hydrogen supply rate of the hydrogen supply module and the nitrogen supply rate of the nitrogen supply device are adjusted so that the pressure of the hydrogen storage module is within the first pressure range, and the ratio between the adjusted hydrogen supply rate and the adjusted nitrogen supply rate is within the preset ratio.

[0019] The system, optionally, the controller is configured to:

[0020] In a case where it is detected that the gas pressure in the hydrogen storage module is not within the preset first pressure range, the hydrogen supply rate of the hydrogen supply module is adjusted so that the pressure of the hydrogen storage module is within the first pressure range.

[0021] In a case where the adjusted hydrogen supply rate and the current nitrogen supply rate are not within the preset ratio, the nitrogen supply rate is adjusted based on the adjusted hydrogen supply rate so that the adjusted hydrogen supply rate and the adjusted nitrogen supply rate are within the preset ratio.

[0022] The system, optionally, the controller is configured to:

[0023] In a case where it is detected that the gas pressure in the hydrogen storage module is greater than the upper limit of the first pressure range, the hydrogen supply rate is increased so that the pressure of the hydrogen storage module is within the pressure range; in a case where the ratio between the increased hydrogen supply rate and the nitrogen supply rate is not within the preset ratio, the nitrogen supply rate of the nitrogen supply device is increased so that the ratio between the increased hydrogen supply rate and the increased nitrogen supply rate is within the preset ratio.

[0024] In a case where it is detected that the pressure of the hydrogen storage module is less than the lower limit value of the first pressure range, the hydrogen supply rate and the nitrogen supply rate are reduced so that the pressure of the hydrogen storage module is within the pressure range; in a case where the ratio between the reduced hydrogen supply rate and the nitrogen supply rate is not within the preset ratio, the nitrogen supply rate of the nitrogen supply device is reduced so that the ratio between the reduced hydrogen supply rate and the reduced nitrogen supply rate is within the preset ratio.

[0025] The system, optionally, the hydrogen supply module comprises:

[0026] a hydrogen compressor and a first valve assembly;

[0027] The input end of the hydrogen compressor is connected with the output end of the hydrogen storage module, and the output end of the hydrogen compressor is connected with the ammonia synthesis reaction device through the first valve assembly.

[0028] The system, optionally, the hydrogen supply module further comprises:

[0029] a second valve assembly;

[0030] The output end of the hydrogen compressor is connected with the input end of the hydrogen compressor through the second valve assembly.

[0031] The system, optionally, the controller is configured to control the opening degree of at least one of the first valve assembly and the second valve assembly to adjust the hydrogen supply rate.

[0032] The system, optionally, the nitrogen supply device comprises:

[0033] a nitrogen delivery module, a nitrogen storage module and a nitrogen supply module;

[0034] The nitrogen delivery module is configured to deliver nitrogen to the nitrogen storage module;

[0035] The nitrogen supply module is configured to supply the nitrogen stored in the nitrogen storage module to an ammonia synthesis reaction device.

[0036] The system, optionally, the controller is configured to:

[0037] In a case where it is detected that the gas pressure in the nitrogen storage module is not within a preset second pressure range, adjust the nitrogen delivery amount of the nitrogen delivery module so that the gas pressure in the nitrogen storage module is within the second pressure range.

[0038] The system, optionally, the nitrogen supply module comprises:

[0039] a nitrogen compressor and a third valve assembly;

[0040] an input end of the nitrogen compressor is connected with an output end of the nitrogen storage module, and an output end of the nitrogen compressor is connected with the synthetic ammonia reaction device through the third valve assembly.

[0041] The system described above, optionally, the nitrogen supply module further comprises:

[0042] a fourth valve assembly;

[0043] an output end of the nitrogen compressor is connected with an input end of the nitrogen compressor through the fourth valve assembly.

[0044] The system described above, optionally, the controller is configured to control the opening degree of at least one of the third valve assembly and the fourth valve assembly, so as to adjust the nitrogen supply rate.

[0045] According to the second aspect of the embodiments of the present application, a gas supply rate control method is provided, which is applied to a controller in a synthetic ammonia system, the synthetic ammonia system further comprising a hydrogen supply device configured to supply hydrogen to a synthetic ammonia reaction device, and a nitrogen supply device configured to supply nitrogen to the synthetic ammonia reaction device, the hydrogen being prepared by the hydrogen supply device according to electric energy provided by a renewable energy power generation device, and the method comprising:

[0046] controlling the ratio between the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device to be a preset ratio.

[0047] Compared with the prior art, the present application has the following advantages:

[0048] The present application provides a synthetic ammonia system and a gas supply rate control method, the synthetic ammonia system comprising a hydrogen supply device, a nitrogen supply device and a controller; the hydrogen supply device is configured to prepare hydrogen according to electric energy provided by a renewable energy power generation device, and supply the hydrogen to a synthetic ammonia reaction device; the nitrogen supply device is configured to supply nitrogen to the synthetic ammonia reaction device; and the controller is configured to control the ratio between the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device to be a preset ratio, so as to avoid the situation that the synthetic ammonia system cannot work normally due to the imbalance between hydrogen and ammonia caused by the fluctuation of hydrogen production amount when the renewable energy power generation fluctuates. The system provided by the present application can still perform ammonia synthesis normally under the condition that the renewable energy power generation fluctuates, and loss caused by shutdown can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative effort based on the provided drawings.

[0050] Figure 1 A structural schematic diagram of a synthetic ammonia system provided by the embodiment of the present application is shown in the figure.

[0051] Figure 2 A structural schematic diagram of a hydrogen supply device provided by the embodiment of the present application is shown in the figure.

[0052] Figure 3 A structural schematic diagram of a hydrogen supply module provided by the embodiment of the present application is shown in the figure.

[0053] Figure 4 A structural schematic diagram of a nitrogen supply device provided by the embodiment of the present application is shown in the figure.

[0054] Figure 5 A structural schematic diagram of a nitrogen supply module provided by the embodiment of the present application is shown in the figure.

[0055] Figure 6 Another structural schematic diagram of a synthetic ammonia system provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort fall within the scope of protection of the present application.

[0057] In the present application, the terms “comprise”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement “comprising a…” does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0058] At present, due to the volatility of renewable energy power generation, the hydrogen production of water electrolysis will also fluctuate, resulting in that the existing synthetic ammonia system cannot normally complete ammonia synthesis operation due to unbalanced raw material ratio, and can only be shut down for treatment.

[0059] Based on this, referring to Figure 1 A structural schematic diagram of a synthetic ammonia system is provided for an embodiment of the present application. The synthetic ammonia system comprises a hydrogen supply device 101, a nitrogen supply device 103, and a controller 103.

[0060] The hydrogen supply device 101 is configured to prepare hydrogen gas according to the electric energy provided by a renewable energy power generation device, and supply the hydrogen gas to a synthetic ammonia reaction device. In this embodiment, the renewable energy power generation device can include a photovoltaic power generation device, a wind power generation device, a tidal power generation device, and the like.

[0061] Optionally, the hydrogen supply device can perform water electrolysis hydrogen preparation operation by using the electric energy provided by the renewable energy power generation device to prepare hydrogen gas, and then supply the prepared hydrogen gas to the synthetic ammonia reaction device. Specifically, the hydrogen gas can be supplied to a raw material storage module of the synthetic ammonia reaction device. In the case where the electric energy provided by the renewable energy power generation device fluctuates, the rate of hydrogen gas prepared by the hydrogen supply device is also prone to fluctuate.

[0062] The nitrogen supply device 102 is configured to supply nitrogen gas to the synthetic ammonia reaction device. In this embodiment, the nitrogen supply device can supply nitrogen gas to the raw material storage module of the synthetic ammonia reaction device.

[0063] Optionally, the synthetic ammonia reaction device can perform ammonia synthesis operation according to the hydrogen gas supplied by the hydrogen supply device and the nitrogen gas supplied by the nitrogen supply device.

[0064] The controller 103 is configured to control the ratio between the hydrogen supply rate of the hydrogen supply device 101 and the nitrogen supply rate of the nitrogen supply device 102 to be a preset ratio.

[0065] Optionally, the preset ratio can be 3:1.

[0066] Optionally, the controller can be various types of upper computer devices, for example, can be a programmable logic controller (PLC).

[0067] In the embodiment, the controller can determine the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device, and if the hydrogen supply rate of the hydrogen supply device and the nitrogen supply rate of the nitrogen supply device are not in the preset ratio, at least one of the hydrogen supply rate and the nitrogen supply rate can be adjusted so that the ratio between the adjusted hydrogen supply rate and the nitrogen supply rate is in the preset ratio. The hydrogen supply rate can be the rate at which the hydrogen supply device supplies hydrogen to the synthetic ammonia reaction device; the nitrogen supply rate can be the rate at which the nitrogen supply device supplies nitrogen to the synthetic ammonia reaction device.

[0068] Optionally, the controller can determine the hydrogen supply rate of the hydrogen supply device according to the first flow meter and the nitrogen supply rate of the nitrogen supply device according to the second flow meter; the first flow meter can be arranged on the hydrogen transmission channel between the hydrogen supply device and the synthetic ammonia reaction device, and the second flow meter can be arranged on the nitrogen transmission channel between the nitrogen supply device and the synthetic ammonia reaction device.

[0069] In the embodiment, by controlling the controller 103 to control the ratio between the hydrogen supply rate of the hydrogen supply device 101 and the nitrogen supply rate of the nitrogen supply device 102 to be in the preset ratio, it can be avoided that when the renewable energy power generation fluctuates to cause the hydrogen production to fluctuate, the proportion of hydrogen and ammonia is unbalanced to cause the synthetic ammonia system to be unable to work normally. By applying the system provided by the application, ammonia synthesis can still be normally carried out under the condition that the renewable energy power generation fluctuates, and loss caused by shutdown can be avoided.

[0070] In some embodiments, the controller 103 adjusts the nitrogen supply rate of the nitrogen supply device 102 when the ratio between the hydrogen supply rate of the hydrogen supply device 101 and the nitrogen supply rate of the nitrogen supply device 102 is not in the preset ratio, so that the ratio between the hydrogen supply rate and the adjusted nitrogen supply rate is in the preset ratio.

[0071] Optionally, when the ratio between the hydrogen supply rate and the nitrogen supply rate is greater than the preset ratio, the nitrogen supply rate can be increased; and when the ratio between the hydrogen supply rate and the nitrogen supply rate is less than the preset ratio, the nitrogen supply rate can be reduced, so that the ratio between the hydrogen supply rate and the nitrogen supply rate is in the preset ratio.

[0072] Referring to Figure 2 A structure schematic diagram of a hydrogen supply device provided by the embodiment of the application is provided, the hydrogen supply device 101 comprises:

[0073] a hydrogen preparation module 201, a hydrogen storage module 202, and a hydrogen supply module 203;

[0074] The hydrogen production module 201 is configured to produce hydrogen based on the electricity provided by the renewable energy power generation device;

[0075] The hydrogen storage module 202 is configured to store the hydrogen produced by the hydrogen production module 201.

[0076] The hydrogen supply module 203 is configured to supply the hydrogen stored in the hydrogen storage module 202 to the ammonia synthesis reaction device.

[0077] In this embodiment, by providing the hydrogen storage module to store the hydrogen produced by the hydrogen production module, and by providing the hydrogen supply module to supply the hydrogen stored in the hydrogen storage module to the ammonia synthesis reaction device, the hydrogen supply rate can be prevented from being directly affected by the fluctuation of the electricity generated by the renewable energy power generation device.

[0078] In some embodiments, when the controller 103 detects that the pressure of the gas in the hydrogen storage module 202 is not within the preset first pressure range, the controller 103 adjusts the hydrogen supply rate of the hydrogen supply module 203 and the nitrogen supply rate of the nitrogen supply device 102 so that the pressure of the hydrogen storage module 202 is within the first pressure range, and the ratio between the adjusted hydrogen supply rate and the adjusted nitrogen supply rate is within the preset ratio.

[0079] In this embodiment, when the pressure of the gas in the hydrogen storage module 202 is not within the preset first pressure range, it indicates that the hydrogen supply rate of the hydrogen supply module does not match the hydrogen production rate of the hydrogen production module. In this case, the hydrogen supply rate needs to be adjusted. In order to balance the hydrogen supply rate and the nitrogen supply rate, the hydrogen supply rate can be adjusted first, and then the nitrogen supply rate can be adjusted based on the adjusted hydrogen supply rate. Alternatively, the hydrogen supply rate and the nitrogen supply rate can be adjusted simultaneously so that the pressure of the hydrogen storage module 202 is within the first pressure range, and the ratio between the adjusted hydrogen supply rate and the adjusted nitrogen supply rate is within the preset ratio.

[0080] In some embodiments, when the controller detects that the pressure of the gas in the hydrogen storage module is greater than the upper limit of the first pressure range, the controller increases the hydrogen supply rate and the nitrogen supply rate so that the pressure of the hydrogen storage module is within the pressure range, and the ratio between the increased hydrogen supply rate and the increased nitrogen supply rate is within the preset ratio.

[0081] In a case where it is detected that the pressure of the hydrogen storage module is less than the lower limit value of the first pressure range, the hydrogen supply rate and the nitrogen supply rate are reduced so that the pressure of the hydrogen storage module is within the pressure range, and the ratio between the reduced hydrogen supply rate and the reduced nitrogen supply rate is within the preset ratio.

[0082] In some embodiments, the controller 103 adjusts the hydrogen supply rate of the hydrogen supply module so that the pressure of the hydrogen storage module is within the first pressure range in a case where it is detected that the pressure of the hydrogen storage module is not within the preset first pressure range; adjusts the nitrogen supply rate according to the adjusted hydrogen supply rate so that the adjusted hydrogen supply rate and the adjusted nitrogen supply rate are within the preset ratio in a case where the adjusted hydrogen supply rate and the current nitrogen supply rate are not within the preset ratio.

[0083] In the present embodiment, the controller 103 adjusts the hydrogen supply rate of the hydrogen supply module so that the pressure of the hydrogen storage module is within the first pressure range.

[0084] Optionally, the controller 103 determines the hydrogen supply rate and the nitrogen supply rate according to the first flow meter and the second flow meter respectively, and adjusts the nitrogen supply rate so that the hydrogen supply rate and the nitrogen supply rate are within the preset ratio in a case where the ratio between the hydrogen supply rate and the nitrogen supply rate is not within the preset ratio.

[0085] In some embodiments, the controller 103 is configured to:

[0086] In a case where it is detected that the pressure of the hydrogen storage module is greater than the upper limit value of the first pressure range, the hydrogen supply rate is increased so that the pressure of the hydrogen storage module is within the pressure range; and the nitrogen supply rate of the nitrogen supply device is increased so that the ratio between the increased hydrogen supply rate and the increased nitrogen supply rate is within the preset ratio in a case where the ratio between the increased hydrogen supply rate and the nitrogen supply rate is not within the preset ratio.

[0087] In a case where it is detected that the pressure of the hydrogen storage module is less than the lower limit value of the first pressure range, the hydrogen supply rate and the nitrogen supply rate are reduced so that the pressure of the hydrogen storage module is within the pressure range; and the nitrogen supply rate of the nitrogen supply device is reduced so that the ratio between the reduced hydrogen supply rate and the reduced nitrogen supply rate is within the preset ratio in a case where the ratio between the reduced hydrogen supply rate and the nitrogen supply rate is not within the preset ratio.

[0088] In some embodiments, the control can detect the pressure of the hydrogen storage module according to a first pressure transmitter, which can be arranged in the hydrogen storage module, and the hydrogen storage module can include a hydrogen storage tank.

[0089] In some embodiments, the hydrogen supply module includes a hydrogen compressor and a first valve assembly; the input end of the hydrogen compressor is connected with the output end of the hydrogen storage module, and the output end of the hydrogen compressor is connected with the synthetic ammonia reaction device through the first valve assembly.

[0090] In an embodiment provided by the present application, based on the above scheme, optionally, the hydrogen supply module further includes a second valve assembly; the output end of the hydrogen compressor is connected with the input end of the hydrogen compressor through the second valve assembly.

[0091] In the embodiment, as shown in Figure 3 The second valve assembly is arranged on the first return pipeline, and the output end of the hydrogen compressor is connected with the input end of the hydrogen compressor through the second valve assembly. By arranging the first return pipeline, the amount of hydrogen in the pipeline can be prevented from being too low to cause the hydrogen compressor to fail to operate normally.

[0092] In an embodiment provided by the present application, based on the above scheme, optionally, the controller 103 is configured to control the opening degree of at least one of the first valve assembly and the second valve assembly, so as to adjust the hydrogen supply rate.

[0093] In the embodiment, the hydrogen supply rate can be increased by increasing the opening degree of the first valve assembly and / or reducing the opening degree of the second valve assembly; and the hydrogen supply rate can be reduced by reducing the opening degree of the first valve assembly and / or increasing the opening degree of the second valve assembly.

[0094] Referring to Figure 4 In an embodiment provided by the present application, based on the above scheme, optionally, the nitrogen supply device 102 includes:

[0095] a nitrogen delivery module 401, a nitrogen storage module 402, and a nitrogen supply module 403;

[0096] The nitrogen delivery module 401 is configured to deliver nitrogen to the nitrogen storage module 402.

[0097] The nitrogen supply module 403 is configured to supply the nitrogen stored in the nitrogen storage module 402 to the synthetic ammonia reaction device.

[0098] In an embodiment provided by the present application, based on the above scheme, optionally, the controller 103 is configured to:

[0099] In the case that the gas pressure in the nitrogen storage module 401 is not in the preset second pressure range, the nitrogen delivery amount of the nitrogen delivery module 401 is adjusted so that the gas pressure in the nitrogen storage module is in the second pressure range.

[0100] In some embodiments, the controller can detect the pressure of the nitrogen storage module according to a second pressure transmitter, which can be arranged in the nitrogen storage module, and the nitrogen storage module can include a nitrogen storage tank.

[0101] In an embodiment provided by the present application, based on the above scheme, optionally, the nitrogen supply module comprises:

[0102] a nitrogen compressor and a third valve assembly;

[0103] The input end of the nitrogen compressor is connected with the output end of the nitrogen storage module, and the output end of the nitrogen compressor is connected with the synthetic ammonia reaction device through the third valve assembly.

[0104] In an embodiment provided by the present application, based on the above scheme, optionally, the nitrogen supply module further comprises:

[0105] a fourth valve assembly;

[0106] The output end of the nitrogen compressor is connected with the input end of the nitrogen compressor through the fourth valve assembly.

[0107] In the present embodiment, referring to Figure 5 , the fourth valve assembly is arranged on the second return pipeline, and the output end of the nitrogen compressor is connected with the input end of the nitrogen compressor through the fourth valve assembly. By arranging the second return pipeline, it can be avoided that the amount of nitrogen in the pipeline is too low to cause the hydrogen compressor to fail to operate normally.

[0108] In an embodiment provided by the present application, based on the above scheme, optionally, the controller is configured to control the opening degree of at least one of the third valve assembly and the fourth valve assembly to adjust the nitrogen supply rate.

[0109] In the present embodiment, the nitrogen supply rate can be increased by increasing the opening degree of the third valve assembly and / or reducing the opening degree of the fourth valve assembly, and the nitrogen supply rate can be reduced by reducing the opening degree of the third valve assembly and / or increasing the opening degree of the fourth valve assembly.

[0110] Optionally, the first valve assembly, the second valve assembly, the third valve assembly and the fourth valve assembly can be thin film regulating valves.

[0111] Referring to Figure 6 Another structure of the synthetic ammonia system is provided in the embodiment of the present application. In the system, a hydrogen storage module is arranged to store the hydrogen produced by the electrolysis of water and to stabilize the pressure of the hydrogen. The hydrogen storage module can be a hydrogen storage tank. A reflux pipeline is arranged before and after the hydrogen compressor. A valve assembly is arranged on the main pipeline and the reflux pipeline. The opening degree of the two valve assemblies is controlled to stabilize the pressure in the hydrogen storage tank. The hydrogen flow into the raw material gas tank is monitored according to the hydrogen flow meter FT-01 on the main pipeline.

[0112] In the system, a nitrogen storage module is arranged to store the nitrogen produced by the nitrogen delivery module and to stabilize the pressure of the nitrogen. The nitrogen storage module includes a nitrogen storage tank, and the nitrogen delivery module includes an air separation system. A reflux pipeline is arranged before and after the nitrogen compressor. A valve assembly is arranged on the main pipeline and the reflux pipeline. The opening degree of the two valve assemblies is controlled to control the nitrogen flow into the raw material gas tank. The nitrogen flow is monitored by the nitrogen flow meter FT-02 on the main pipeline, and the reading of the hydrogen flow meter FT-01 is matched to maintain the ratio of the hydrogen and nitrogen into the raw material gas tank at 3:1. The pressure transmitter PT-02 is arranged on the nitrogen storage tank to adjust the air output of the air separation system according to the pressure change of the nitrogen storage tank.

[0113] When the output power of the renewable energy power generation device fluctuates and decreases, the hydrogen flow decreases, causing the pressure of the hydrogen storage tank to decrease and being fed back to the controller through the pressure transmitter PT-01. The controller increases the opening degree of the second valve assembly PCV-01 and decreases the opening degree of the first valve assembly PCV-02 to reduce the hydrogen flow into the raw material gas tank and increase the flow before the hydrogen compressor, thereby maintaining the pressure of the hydrogen storage tank stable. At this time, the hydrogen flow meter FT-01 feeds back the hydrogen flow to the controller, and the controller increases the opening degree of the fourth valve assembly FCV-01 and decreases the opening degree of the third valve assembly FCV-02 to reduce the nitrogen flow into the raw material gas tank and stabilize the ratio of the reading of the nitrogen flow meter FT-02 to the reading of the hydrogen flow meter FT-01 at 1:3.

[0114] Conversely, when the output power of the renewable energy power generation device fluctuates upward, the hydrogen gas flow rate increases, causing the pressure of the hydrogen gas storage tank to rise, and the pressure transmitter PT-01 feeds back to the controller. The controller reduces the opening of the second valve assembly PCV-01 and increases the opening of the first valve assembly PCV-02, so that the hydrogen gas entering the raw gas tank increases and the flow rate before the hydrogen compressor decreases, thereby maintaining the pressure of the hydrogen gas storage tank stable. At this time, the hydrogen gas flow meter FT-01 feeds back the hydrogen gas flow rate to the controller, and the controller reduces the opening of the fourth valve assembly FCV-01 and increases the opening of the third valve assembly FCV-02, so that the flow rate of nitrogen gas entering the raw gas tank increases, and the ratio of the reading of the nitrogen gas flow meter FT-02 to the reading of the hydrogen gas flow meter FT-01 is stabilized at 1:3.

[0115] The nitrogen gas storage tank is provided with a pressure transmitter PT-02, when the pressure of the nitrogen gas storage tank rises, the controller reduces the air output of the air separation system, and when the pressure of the nitrogen gas storage tank decreases, the controller increases the air output of the air separation system, thereby maintaining the pressure of the nitrogen gas storage tank stable.

[0116] The embodiment of the present application also provides a gas supply rate control method, which is applied to the controller in the above-mentioned synthetic ammonia system, the synthetic ammonia further comprises a hydrogen gas supply device for supplying hydrogen gas to a synthetic ammonia reaction device, and a nitrogen gas supply device for supplying nitrogen gas to the synthetic ammonia reaction device, the hydrogen gas is prepared by the hydrogen gas supply device according to the electric energy provided by the renewable energy power generation device, and the method comprises the following steps:

[0117] The ratio between the hydrogen gas supply rate of the hydrogen gas supply device and the nitrogen gas supply rate of the nitrogen gas supply device is controlled to be a preset ratio.

[0118] The gas supply method disclosed in the above-mentioned embodiment of the present application is the same as the specific principle and execution process of the control device in the above-mentioned synthetic ammonia system, and the corresponding part of the synthetic ammonia system provided by the above-mentioned embodiment of the present application can be referred to, and the rest is not described here.

[0119] The embodiment of the present application also provides a storage medium, which comprises stored instructions, wherein when the instructions are executed, the controller of the synthetic ammonia system where the storage medium is located executes the above-mentioned gas supply rate control method.

[0120] It should be noted that each embodiment in the specification adopts a progressive manner for description, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related part can be referred to the part of the method embodiment.

[0121] Finally, it is to be understood that the phraseology or terminology employed herein, such as "first" and "second", etc. for example, is for the purpose of differentiating one

[0122] For the convenience of description, the above apparatus is described in various units according to functions respectively. Of course, the functions of the units can be implemented in one or more software and / or hardware in the implementation of the present application.

[0123] The above has introduced in detail a synthetic ammonia system provided by the present application, the principle and implementation mode of the present application are described by applying specific examples in this paper, the above example is only used for helping understanding the method of the present application and its core idea; at the same time, for the general technical personnel in the art, according to the idea of the present application, the specific implementation mode and application range will have changes, and the above is summarized, the content of the specification should not be understood as the limitation of the present application.

Claims

1. An ammonia synthesis system characterized by, The application relates to a hydrogen and nitrogen supply device for a synthetic ammonia reaction device. The device comprises a hydrogen supply device, a nitrogen supply device and a controller. The hydrogen supply device comprises a hydrogen preparation module, a hydrogen storage module and a hydrogen supply module. The hydrogen preparation module is used for preparing hydrogen according to the electric energy provided by a renewable energy power generation device. The hydrogen storage module is used for storing the hydrogen prepared by the hydrogen preparation module. The hydrogen supply module is used for supplying the hydrogen stored in the hydrogen storage module to the synthetic ammonia reaction device. The nitrogen supply device is used for supplying nitrogen to the synthetic ammonia reaction device.

2. The system of claim 1, wherein, The controller is used for adjusting the hydrogen supply rate of the hydrogen supply module and the nitrogen supply rate of the nitrogen supply device when detecting that the gas pressure in the hydrogen storage module is not in a preset first pressure range, so that the pressure in the hydrogen storage module is in the first pressure range, and the ratio between the adjusted hydrogen supply rate and the adjusted nitrogen supply rate is in a preset ratio. The controller is used for: adjusting the hydrogen supply rate of the hydrogen supply module when detecting that the gas pressure in the hydrogen storage module is not in a preset first pressure range, so that the pressure in the hydrogen storage module is in the first pressure range; 3. The system of claim 2, wherein, adjusting the nitrogen supply rate according to the adjusted hydrogen supply rate when the adjusted hydrogen supply rate and the current nitrogen supply rate are not in a preset ratio, so that the adjusted hydrogen supply rate and the adjusted nitrogen supply rate are in a preset ratio. The controller is used for: increasing the hydrogen supply rate so that the pressure in the hydrogen storage module is in the first pressure range when detecting that the gas pressure in the hydrogen storage module is greater than the upper limit value of the first pressure range; increasing the nitrogen supply rate of the nitrogen supply device so that the ratio between the increased hydrogen supply rate and the increased nitrogen supply rate is in a preset ratio when the ratio between the increased hydrogen supply rate and the nitrogen supply rate is not in a preset ratio; 4. The system of claim 1, wherein, decreasing the hydrogen supply rate and the nitrogen supply rate so that the pressure in the hydrogen storage module is in the first pressure range when detecting that the pressure in the hydrogen storage module is less than the lower limit value of the first pressure range; decreasing the nitrogen supply rate of the nitrogen supply device so that the ratio between the decreased hydrogen supply rate and the decreased nitrogen supply rate is in a preset ratio when the ratio between the decreased hydrogen supply rate and the nitrogen supply rate is not in a preset ratio. The hydrogen supply module comprises a hydrogen compressor and a first valve assembly. The input end of the hydrogen compressor is connected with the output end of the hydrogen storage module, and the output end of the hydrogen compressor is connected with the synthetic ammonia reaction device through the first valve assembly.

5. The system of claim 4, wherein, The hydrogen supply module further comprises a second valve assembly. ​ An output end of the hydrogen compressor is connected with an input end of the hydrogen compressor through the second valve assembly.

6. The system of claim 5, wherein, The controller is configured to control an opening degree of at least one of the first valve assembly and the second valve assembly to adjust the hydrogen supply rate.

7. The system of claim 1, wherein, The nitrogen supply device comprises: a nitrogen delivery module, a nitrogen storage module and a nitrogen supply module; The nitrogen delivery module is configured to deliver nitrogen to the nitrogen storage module. The nitrogen supply module is configured to supply the nitrogen stored in the nitrogen storage module to the ammonia synthesis reaction device.

8. The system of claim 7, wherein, The controller is configured to: adjust a nitrogen delivery amount of the nitrogen delivery module so that the gas pressure in the nitrogen storage module is within a preset second pressure range, when it is detected that the gas pressure in the nitrogen storage module is not within the preset second pressure range.

9. The system of claim 8, wherein, The nitrogen supply module comprises: a nitrogen compressor and a third valve assembly; An input end of the nitrogen compressor is connected with an output end of the nitrogen storage module, and an output end of the nitrogen compressor is connected with the ammonia synthesis reaction device through the third valve assembly.

10. The system of claim 9, wherein, The nitrogen supply module further comprises: a fourth valve assembly; An output end of the nitrogen compressor is connected with an input end of the nitrogen compressor through the fourth valve assembly.

11. The system of claim 10, wherein, The controller is configured to control an opening degree of at least one of the third valve assembly and the fourth valve assembly to adjust the nitrogen supply rate.

12. A gas supply rate control method characterized by, A controller applied to an ammonia synthesis system, the ammonia synthesis system further comprising a hydrogen supply device and a nitrogen supply device for supplying nitrogen to an ammonia synthesis reaction device, the hydrogen supply device comprising a hydrogen preparation module, a hydrogen storage module and a hydrogen supply module, the hydrogen preparation module being configured to prepare hydrogen according to electric energy provided by a renewable energy power generation device; The hydrogen storage module is configured to store the hydrogen prepared by the hydrogen preparation module. The hydrogen supply module is configured to supply the hydrogen stored in the hydrogen storage module to the ammonia synthesis reaction device; and the method comprises: adjusting a hydrogen supply rate of the hydrogen supply module and a nitrogen supply rate of the nitrogen supply device so that the pressure of the hydrogen storage module is within a preset first pressure range, and a ratio between the adjusted hydrogen supply rate and the adjusted nitrogen supply rate is within a preset ratio, when it is detected that the gas pressure in the hydrogen storage module is not within the preset first pressure range.

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